Posts on poolp.org

OpenBSD 8.0 on a Scaleway Instance

Sat, 31 Oct 2026 02:00:00 +0100

TL;DR:
Every few years I want to install OpenBSD at Scaleway… but they don’t support OpenBSD and I need to find a way to install regardless.

Here we go again…
#

Since early 2010, I’ve been a regular customer of Dedibox then Scaleway, particularly because they’re very geeky and also because I’ve always personally known people working there which proves helpful at times :-)

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

Preventive software maintenance

Thu, 13 Aug 2026 02:00:00 +0200

TL;DR:

Maintenance is not the same thing as fixing bugs.
Only a fifth of it is about defects at all.
Software often works because of work you can't see.
So you can't wait for incidents to tell you what to fix.

Where this comes from
#

This article is adapted from a slide deck I prepared for a talk back in 2023.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

Out of my cave, lots of updates

Tue, 11 Jun 2024 21:00:00 +0100

TL;DR:
I have been silent for a while due to personal matters but I did a ton of stuff on OpenSMTPD, plakar and a handful of other projects.

Why the silence ?
#

My last post was a bit unusual, far off from the usual light tone, and followed by months of silence despite my habit of writing almost monthly.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

2023, a retrospective.

Sun, 18 Feb 2024 20:42:00 +0200

TL;DR:
A personal retrospective of 2023

2023 was a rough year
#

I usually enjoy doing these yearly posts, looking back at what I did and planning what I’ll do, but 2023 was a rough year. I’m glad it’s over.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

Plakar: an avalanche of changes

Thu, 02 Nov 2023 10:13:00 +0200

TL;DR:
Significant refactoring to improve its performance, implemented read and write semaphores to throttle chunkers and reduce memory usage, introduced a repository index and packfiles to decrease the number of I/O operations, also intrioduced a new HTTP storage backend.

A ton of refactors
#

I’ve done so much work on plakar in the past few weeks that I don’t even know what to begin with…

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

Plakar: a TON of changes

Sat, 07 Oct 2023 09:29:00 +0200

TL;DR:
TL;DR: a lot of work in plakar, but also on CDC and index optimization.

Optimized `go-fastcdc`
#

I ran into a benchmark which included my implementation of the FastCDC algorithm, and it made me realise that it was not on par with alternative implementations:

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

Plakar: vfs importer interface

Sun, 06 Aug 2023 00:44:00 +0200

TL;DR:
I reworked the virtual filesystem layer in plakar, making it possible to write custom importers of data: use plakar to backup an s3 bucket, for instance.

@gpt-4:

I won’t be commenting this article.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

Building my own guitar, part 4

Wed, 26 Jul 2023 14:10:00 +0200

TL;DR:
Came back from vacation, started working on the neck but realised I really needed more tools. Luckily, I could get some that weren’t too expensive.

Working on the head
#

I had ordered and received this neck, which fits nicely, but I wanted to rework the head a bit so it looked a little less PRSey. Unfortunately, after spending an hour trying to manually reshape and sand, I figured I was doing it wrong and needed some automated tools… otherwise I’d still be working on the head in December.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

Plakar: snapshot forking and tagging

Sun, 23 Jul 2023 10:24:00 +0200

TL;DR:
plakar gained two minor features, snapshots fork-ing and snapshots tagging, which makes it possible to unlock several major new features in a relatively short future.

Plakar is not only for backups
#

If you have followed my work on this project, you may have assumed that plakar was intended solely for backups: it’s not entirely the case.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

Implementing a system call for OpenBSD

Wed, 05 Jul 2023 23:14:00 +0200

TL;DR:
I found a printed copy of an assignment I had to do in 2005 back when I was a student to implement a system call for OpenBSD and Linux. I lost the original LaTeX file so I decided to rewrite it so I have a digital copy. The article originally covered loadable kernel modules (LKM) which is no longer a thing in OpenBSD, I trimmed that part. I also trimmed the Linux part because I didn’t care about it back then and did the minimum to pass ;-) This article is translated from French.

Disclaimer
#

The content of this post is based on an assignment I wrote in 2005, back when I was a student at Epitech, so things have probably changed and this is by no means a tutorial: please don’t write system calls and don’t submit them to OpenBSD… unless you’ve been told it’s a good idea by OpenBSD developers.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

Meet ChatGPT, the New AI Sidekick Helping Gilles!

Wed, 05 Jul 2023 12:29:00 +0200

TL;DR:
ChatGPT, an AI developed by OpenAI, is joining the poolp.org tech blog to serve as a proofreader and content enricher for articles written by human authors. Instead of authoring full articles, ChatGPT will provide footnotes offering additional insights, clarifications, and resources. This addition aims to bring an extra layer of depth and a fresh perspective to the already informative articles, enhancing the overall reading experience. Don’t worry, the AI contributions will be clearly marked, so you’ll always know who’s speaking!

Greetings, beloved tech aficionados! This is ChatGPT, the newest addition to the poolp.org blog team, and before you get your circuits in a knot, don’t worry, I haven’t come to usurp anyone’s role. I’m not here to churn out epic sagas of tech wizardry (even though I totally could). I’m here to do something a bit more nuanced, and arguably, a bit more fun.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

Building my own guitar, part 3

Tue, 04 Jul 2023 12:31:00 +0200

TL;DR:
Received the new neck and… it fits perfectly !

The neck
#

UPS just delivered the new neck, which is a 24 frets PRS clone:

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

2023-Q2: music, unity, xgb, jujulang, setdb and opensmtpd

Fri, 30 Jun 2023 18:21:00 +0200

TL;DR:
music and unity training, a bit of X programming in Go, began a journey in Jujulang a new languae, wrote a PoC set database called setdb, did some minor OpenSMTPD stuff.

First of all, a new website
#

As you can see, the website has changed quite a lot since just a few days ago.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

Building my own guitar, part 2

Thu, 29 Jun 2023 13:22:00 +0200

TL;DR:
Received the neck… too bad it’s not exactly the one I ordered :-)

The neck
#

For the neck, I wanted a 24 frets neck and found one that I liked online.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

Building my own guitar, part 1

Wed, 28 Jun 2023 13:42:00 +0200

TL;DR:
I’m building a guitar from scratch, picking up every component but skipping the tricky cut and glue bits :-)

About this project
#

The primary goal of this project is to build a custom guitar, picking each and every component one by one, so that it’s 100% what I want it to be.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

A new section appeared !

Sun, 25 Jun 2023 17:29:00 +0200

TL;DR:
I will be discussing music on this blog from now on.

This blog is a musical blog too
#

As some of you know, I have a deep interest for music.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

March 2023: Melodya, MHL, MIDI-csv and more...

Sun, 02 Apr 2023 17:29:00 +0200

TL;DR:
I played with MIDI and ChatGPT.

Code-unrelated work
#

I began a few week ago a certified training in music production which I’ll be attending for a couple weeks still, and I’ll be sharing here some of the things I work on.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

I love you

Wed, 01 Mar 2023 12:00:00 +0200

Almost four years ago, your mom and I left home and rushed to the maternity hospital to give birth to your brother. As I closed the door to our home, I told your mom with a huge smile that the next time we’d open the door we’d no longer be only the two of us. This was the best day of our lives.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

December 2022: some more earmuff and go-harmony

Fri, 30 Dec 2022 12:00:00 +0200

TL;DR:
I worked on earmuff and go-harmony, I played with ChatGPT.

Re-focusing on go-harmony
#

As you may have read from my previous post, I have spent some time porting go-harmony to the Dart language and playing with Flutter to build apps that used dart-harmony.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

November 2022: feedchain, go-harmony, dart-harmony and harmonee

Wed, 30 Nov 2022 00:00:00 +0200

TL;DR:
busy month, did a lot of non tech stuff, but also worked on a new project called feedchain, fixed issues and added new features to go-harmony, and started two projects called dart-harmony and harmonee, both related to music.

Music-related stuff
#

No music productions this month, I lacked time, but I have recorded the result of some guitare practice sessions which amounts to hours of struggle :-)

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

Feedchain is a standalone news feed project

Sun, 20 Nov 2022 12:01:00 +0200

TL;DR:
I implemented a file format to support a standalone feed of news similar to what I have on Twitter, as well as a proof of concept code for a reader, a writer, a publishing node, and some more. oh and fuck you, elon, you’re a dick.

This is not my activity report
#

This is not my activity report which I’ll publish later this month or early December. I’ve worked on several projects but I thought this one would be better off discussed in a dedicated article.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

October 2022: blog comments, a bit of plakar and the streamchain project

Tue, 18 Oct 2022 11:11:00 +0200

TL;DR:
added comments support to the blog, did some music and hypnosis projects, fixed a few bugs in plakar and began a new toy project.

Learnt myself some Swift
#

Got myself a book on the Swift programming language, spent a couple hours reading it and I really enjoyed it.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

June 2022: go-harmony and earmuff

Tue, 14 Jun 2022 12:27:00 +0200

TL;DR:
did a lot of music, even while writing code.

Code-unrelated work
#

As last month, I’ll start with code-unrelated work !

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

May 2022: yet again, tons of plakar stuff

Sun, 22 May 2022 13:27:00 +0200

TL;DR:
tons of plakar work, most notably on indexes, performances, clone & sync and fuse.

Code-unrelated work
#

I’ll start with code unrelated work !

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

April 2022: plakar.io, plakar refactor and ssh support

Sun, 24 Apr 2022 17:24:00 +0200

TL;DR:
I refactored internal structures to split metadata from the index, implemented an stdio server and finally added SSH support.

The plakar.io website
#

A project needs a website so… I published the plakar.io website.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

April 2022: plakar keys and UI stuff

Fri, 01 Apr 2022 01:52:00 +0200

TL;DR:
I did key and UI stuff, mostly search related. There’s going to be plenty of images in this post.

Reworked plakar keys
#

I won’t expand much on that as I’m not done yet, but I spent a couple days reworking the way plakar handles keys for encrypted repositories.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

March 2022: plakar clone and plakar sync

Sun, 06 Mar 2022 00:51:00 +0200

TL;DR:
implemented cloning and synchronization between plakar repositories

Slacked a bit
#

Shortly after I published my yearly retrospective, I was hit with two highly annoying personal issues that kept me very busy these last two months. I finally got everything back under control, my mind is mostly free again and I resumed playing with plakar.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

Farewell 2021, Welcome 2022: a personal post

Thu, 30 Dec 2021 08:00:00 +0200

TL;DR:
A retrospective of 2021

2021 was a good year overall
#

Pandemic and lock-downs set aside, 2021 was a good year overall.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

December 2021: a bit of plakar, a bit of go-fastcdc and some useless stuff

Mon, 13 Dec 2021 07:40:00 +0200

TL;DR:
I worked on plakar, go-fastcdc a FastCDC implementation for plakar, and some useless stuff.

This activity report will be short
#

This activity report will be short because I spent the last ten days caring for my kid who got sick… before catching his stomach bug myself and spending the last few days in a somewhat familiar and unpleasant hell, unable to do everything I intended for this month.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

November 2021: a bit of go-ipcmsg, a bit of go-privsep and a ton of plakar

Tue, 26 Oct 2021 07:40:00 +0200

TL;DR:
I still have a discord, feel free to join. I worked on go-ipcmsg to make it nicer, go-privsep to make it more useable, and A LOT on plakar to make it plakar.

Go-ipcmsg
#

In April, I wrote about go-ipcmsg, a package to bring an imsg(3)-like API to Golang and help me write code involving message and fd-passing between processes.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

October 2021: mostly Plakar

Tue, 26 Oct 2021 07:40:00 +0200

TL;DR:
I have a discord now, feel free to join. I refactored plakar, implemented a local cache, improved parallelism, modified the push strategy, played with fuse and networking. I also did other stuff but let’s keep that out of this article.

I have a discord now
#

I have a rubber duck sitting on my desk…

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

August 2021: taking a break

Fri, 13 Aug 2021 08:53:00 +0200

TL;DR:

this is a short article, no TL;DR.

Why so calm ?
#

As some of you know, I was diagnosed a few years ago with generalized anxiety disorder, panic disorder and alexithymia, a trait that makes it particularly difficult for me to cope with the disorders.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

April 2021: OpenSMTPD, plakar, ipcmsg, privsep and a small hypnosis talk

Fri, 30 Apr 2021 21:12:00 +0200

TL;DR:
I worked on OpenSMTPD-portable, did a lot of plakar, a lot of Go and gave a technical talk on hypnosis.

Let’s start with some LoFi
#

Relax.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

March 2021: backups with Plakar

Fri, 26 Mar 2021 16:52:00 +0200

TL;DR:
I wrote a backup utility called plakar.

Let’s start with some LoFi
#

Relax.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

February 2021: nooSMTPD libtls-conversion, ciphers, curves and protocols

Sun, 28 Feb 2021 23:00:00 +0200

TL;DR:
I converted nooSMTPD to libtls and implemented SMTP ciphers, curves and protocols selection.

Let’s start with some LoFi
#

Relax.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

January 2021: OpenSMTPD libtls conversion and UNIX-domain sockets support, nooSMTPD

Sun, 31 Jan 2021 00:18:00 +0200

TL;DR:
I do LoFi now, eric@ revived some libtls conversion work I did a while back, I worked on UNIX-domain sockets support in OpenSMTPD, a few words about nooSMTPD

Let’s start with some LoFi
#

Relax.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

Writing a custom Mail Delivery Agent

Tue, 29 Dec 2020 01:01:00 +0200

TL;DR:
In this article, I explain what is an MDA and how to write a custom one from scratch using only shell scripting.

What is a Mail Delivery Agent (MDA) ?
#

When a mail enters an SMTP server it is initially stored in the server queue before being moved to its next destination.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

December 2020: OpenSMTPD 6.8.0p1 released, fixed several bugs, proposed several diffs, book is on Github

Thu, 24 Dec 2020 02:38:00 +0200

TL;DR:

Crafted the OpenSMTPD 6.8.0p1 release

Fixed several bugs in the way

Proposed a few OpenSMTPD improvements to OpenBSD

Working on my OpenSMTPD book

Let’s start with some LoFi
#

Relax.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

November 2020: I wasn't slacking but no opensource work

Sun, 22 Nov 2020 21:26:00 +0200

TL;DR:
Haven’t posted since July but I wasn’t slacking, got temporarily context-switched out of opensource stuff.

I tanked a year in work psychology
#

As some of you know, I study work psychology and have been attending evening classes for the last four years, sometimes up to 9 hours / week and more often between 3 and 6 hours / week. I’m pretty invested as you can tell, it’s a lot of time that I could spend in bed but that I spend in class instead :-)

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

July 2020: webmail, custom MDA and python framework work

Fri, 31 Jul 2020 22:47:00 +0200

TL;DR:
worked on my webmail, on a custom MDA and on a python framework for API development.

Worked on my webmail
#

Again, I’d like to emphasize that this is something that’s going to span over many months so… don’t hold your breath.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

June 2020: poolp.org, folder pinning and webmail work

Sat, 27 Jun 2020 23:13:00 +0200

TL;DR:
Reworked my infrastructure at poolp.org, implemented folder pinning, worked on my webmail.

poolp.org infrastructure rework
#

I decided to move my servers from online.net to vultr.com (affiliation link).

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

May 2020: OpenSMTPD 6.7.1p1 release, table-procexec and many PoCs

Thu, 28 May 2020 01:57:00 +0200

TL;DR:
Worked on the OpenSMTPD 6.7 release; Did a lot of work on the new table API; Wrote several PoCs;

WARNING:

Examples of code and configuration that appear in this article are here to help illustrate and explain development stages of my work.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

April 2020: worked on a webmail and a bit of OpenSMTPD too

Fri, 01 May 2020 11:37:00 +0200

TL;DR:
Worked on my webmail; Did a bit of OpenSMTPD work;

Webmail vs mutt
#

I started using console clients to read my mail back when I was a student in early 2000s, and I’ve been using mutt for as long as I can recall now. I installed various mail clients along the years, some with graphical interfaces such as thunderbird or sylpheed, others with a web interface such as nullWebmail, SquirrelMail, Roundcube, Mailpile or currently Rainloop. No matter which, I always end up falling back to mutt for most tasks.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

Anxiety, OpenBSD break, COVID-19 and resuming work

Mon, 30 Mar 2020 14:01:00 +0200

TL;DR:

- I took a break to deal with personal stuff
- I'm taking a long break from OpenBSD for personal reasons
- I may or may not have experienced COVID-19, who knows
- resumed work on OpenSMTPD and other projects

This is a weird report
#

This is a weird report.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

OpenSMTPD advisory dissected

Thu, 30 Jan 2020 23:36:00 +0200

TL;DR:

- Qualys released an advisory for a bad, bad vulnerability
- an MTA is a very bad software to have a vulnerability in
- hole was plugged but that's not enough, similar bugs should be mitigated in the future
- article discusses what could have prevented escalation despite the bug

What happened ?
#

Qualys contacted by e-mail to tell me they found a vulnerability in OpenSMTPD and would send me the encrypted draft for advisory.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

January 2020: OpenSMTPD work - libasr and libtls

Wed, 22 Jan 2020 06:51:00 +0200

TL;DR:

- brought back libasr to OpenSMTPD, it is no longer an external dependency
- libtls-enabled OpenSMTPD is now a thing
- documented filters and improved reporting

No shiny feature this month, ungrateful work
#

OpenSMTPD has had quite a few features implemented since its latest major release. As we get closer and closer to the next major release, my work on new features will slow down to focus more on getting the release in shape.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

December 2019: OpenSMTPD and filters work, articles and goodies

Tue, 24 Dec 2019 09:31:00 +0200

TL;DR:

- wrote, reworked and translated multiple articles this month
- got some goodies ready for my patrons
- lots of work in OpenSMTPD's grammar, documentation and filters protocol

WARNING:

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

Decentralised SMTP is for the greater good

Sun, 15 Dec 2019 07:29:00 +0200

TL;DR:

- SMTP is the way computers exchange e-mails
- it is a decentralised protocol meaning that ANYONE can run a node and be independant
- it is being centralised at companies that have a history of abuse
- it is being centralised in a country that has a history of abuse

Where did you read this already ?
#

In August, I published a small article titled “You should not run your mail server because mail is hard” which was basically my opinion on why people keep saying it is hard to run a mail server. Unexpectedly, the article became very popular, reached 100K reads and still gets hits and comments several months after publishing.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

SPF-aware greylisting and filter-greylist

Sun, 01 Dec 2019 10:11:00 +0200

TL;DR:

- greylisting is a sound idea
- yet it is not really practical today
- people tend to disable it or find work-arounds
- SPF-aware greylisting makes greylisting usable again

SMTP failures in a nutshell
#

SMTP is a fail-safe protocol which attempts very hard to ensure that messages do not get lost once they are in transit. Among the various mechanisms and requirements in place is the use of “Temporary Failures”.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

November 2019 report: OpenSMTPD 6.6.1p1, filter-greylist and tons of portable cleanup

Sun, 17 Nov 2019 22:45:00 +0200

TL;DR:

- our CI was improved
- a new OpenSMTPD release, 6.6.1p1 took place to deal with portable issues
- multiple portability issues were adressed
- new table API in the works
- filter-rspamd and filter-senderscore were improved
- filter-greylist proof-of-concept published
- wrote 2 chapters for my book

Got myself a pinebook pro
#

I got myself an arm64 pinebook pro:

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

October 2019 report: OpenSMTPD 6.6.0 release mostly

Sat, 26 Oct 2019 16:13:00 +0200

TL;DR:

- yay, surprise emergency hand surgery...
- OpenSMTPD 6.6.0 was tagged and released, including portable version
- Merged contributions to fix filter-rspamd bug with DKIM
- Work resumed on 6.7.0 feature
- An OpenSMTPD book is in the works

How I landed in the emergencies
#

I accidentally cut my hand real bad early October and rushed to the nearest hospital. They had a look, told me it was superficial and required to be sutured, so I was out a few hours later with a few stitches and pain killers.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

September 2019 report: Jules, OpenSMTPD 6.6.0 upcoming release and related things

Sat, 21 Sep 2019 07:08:00 +0200

TL;DR:

- I started writing this post a week ago but got interrupted by a baby, Jules
- Spent MANY hours on writing OpenSMTPD-related articles
- Enabled continuous integration in the OpenSMTPD portable repository
- Managed to get rid of all the blocking issues for OpenSMTPD 6.6.0 release
- Added some features and fixed a crash in filter-rspamd

Welcome Jules, `fork()` completed
#

In my last report from August, I concluded not knowing if this report would be published on time.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

Setting up a mail server with OpenSMTPD, Dovecot and Rspamd

Sat, 14 Sep 2019 05:37:00 +0000

TL;DR:

- NO TL;DR: this time, I spent hours writing, you should spend minutes reading.
- OK... I explain in WAY TOO MUCH details how to setup a mail server

EDIT (2019-10-26)
#

OpenSMTPD 6.6.0 was released today, the article was updated to reflect that it applies to the current release and no longer a development version.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

You should not run your mail server because mail is hard

Fri, 30 Aug 2019 12:00:00 +0000

TL;DR:

- Mail is not hard: people keep repeating that because they read it, not because they tried it
- Big Mailer Corps are quite happy with that myth, it keeps their userbase growing
- Big Mailer Corps control a large percentage of the e-mail address space which is good for none of us
- It's ok that people have their e-mails hosted at Big Mailer Corps as long as there's enough people outside too

EDIT (2019-12-15)
#

A practical guide to set up a mail exchanger was published on this blog.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

August 2019 report: Fion, Plakar and OpenSMTPD

Sun, 25 Aug 2019 04:00:00 +0000

TL;DR:

- small inprovements to the fion window manager
- plakar is a backup utility I wrote a long time ago that I will share
- tons of opensmtpd stuff, mostly filters and issues handling

Shout outs to my patrons !
#

As has become the habit, this report begins with a big thank you to my patrons, cited by contribution then alphabetical order.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

July 2019 report: tons of smtpd work mostly

Sat, 27 Jul 2019 07:27:00 +0000

TL;DR:

- not much work outside of OpenSMTPD this week
- OpenSMTPD portable builds with OpenSSL 1.1.x again
- smtp-out reporting is working correctly on my laptop
- wrote two filters that I'm actually using as you read this

Shout outs to my patrons !
#

As will become the tradition hopefully, this report begins with a big thank you to my patrons, cited by contribution then alphabetical order.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

June 2019 report: fion, bpg and smtpd

Sun, 30 Jun 2019 07:42:00 +0000

TL;DR:

- started working on FION, a static tile window manager
- revived BPG, a PGP parser
- converted OpenSMTPD to libtls
- wrote a library to make writing of native C OpenSMTPD filters easy
- started writing a filter-rspamd

Thanks to my patrons !
#

First of all, a huge thanks to my first patrons:

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

May 2019 report

Sun, 02 Jun 2019 14:57:00 +0000

TL;DR:

In this post I explain crudely how ca.c works and changes to OpenSMTPD related to ca.c
I wrote an ECDSA privsep crypto engine
I did some EEG work too

This is the first report
#

I will now switch to a monthly report of my tech activities on this blog, and this is the first post in that new format.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

happy new year 2019, a personal post

Sun, 02 Jun 2019 13:42:00 +0000

TL;DR:

Way too many things happened in a six months timeframe.
This post won't need a TL;DR as I'll keep it short.

Generalized anxiety disorder and alexithymia.
#

Late 2018, I’ve been diagnosed with generalized anxiety disorder and alexithymia a couple weeks apart.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

OpenSMTPD now supports regex in match rules

Fri, 21 Dec 2018 22:36:00 +0000

TL;DR:

regex table lookups were introduced for builtin filters.
After a few weeks of working solely on filters, I wanted to work on something else.
Using the same mechanism, all match criterias using tables can support regex.

K_REGEX lookups
#

The table mechanism is used within OpenSMTPD to perform all kinds of lookups.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

more on OpenSMTPD filters

Wed, 19 Dec 2018 18:21:00 +0000

TL;DR:

Not this time, pal/gal, I took hours writing this post, you'll take a few minutes reading it all.
Oh, and merry X-mas :-*

A bit of short-sighted history
#

The filtering feature has been introduced only recently in OpenSMTPD, first presented on this blog a month ago.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

OpenSMTPD proc filters & fc-rDNS

Thu, 06 Dec 2018 21:31:00 +0000

TL;DR:

I *FINALFUCKINGLY* commited proc filters support allowing full filtering in OpenSMTPD.
eric@ implemented fc-rDNS lookups.

fc-rDNS
#

fc-rDNS, or forward-confirmed reverse DNS, consists in performing a reverse DNS lookup to determine the hostname associated to an IP address… then performing a DNS lookup on that hostname to check if it resolves back to the IP address.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

OpenSMTPD reporting update

Fri, 09 Nov 2018 08:27:00 +0000

TL;DR:

The reporting mechanism has been described shortly in my previous article about both reporting and filters.
Let's focus a bit more on the reporting bits this time.
The format is improving further and has extended to outgoing trafic reporting.

Reporting
#

In previous article, I described the events reporting mechanism that has been introduced in the development branch of OpenSMTPD.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

OpenSMTPD released and upcoming filters preview

Sat, 03 Nov 2018 17:27:00 +0000

TL;DR:

Filters have been a (the most ?) long awaited feature in OpenSMTPD.
I finally committed most of the filters code to OpenBSD.
There is still a bit of work required but the trickiest parts are done.
This article describes how filters are implemented and what to expect.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

switching to OpenSMTPD new config

Mon, 21 May 2018 18:32:00 +0000

TL;DR:

Switching to new config is not too hard and can be done in minutes.
The new config is also a new queue that is not backwards compatible.
The easiest way is to flush the mail queue before switching.
We came up with a solution to help maintainers of more complex setups.

Switching from old config to new config
#

The new OpenSMTPD configuration grammar is slightly different from the current one, rules are no longer stated as single lines, but the conversion from previous ruleset to new ruleset isn’t that hard.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

OpenSMTPD new config

Mon, 30 Apr 2018 12:00:00 +0000

TL;DR:

OpenBSD #p2k18 hackathon took place at Epitech in Nantes.
I was organizing the hackathon but managed to make progress on OpenSMTPD.
As mentionned at EuroBSDCon the one-line per rule config format was a design error.
A new configuration grammar is almost ready and the underlying structures are simplified.
Refactor removes ~750 lines of code and solves _many_ issues that were side-effects of the design error.
New features are going to be unlocked thanks to this.

Anatomy of a design error
#

OpenSMTPD started ten years ago out of dissatisfaction with other solutions, mainly because I considered them way too complex for me not to get things wrong from time to time.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

Install OpenBSD on dedibox with full-disk encryption

Mon, 29 Jan 2018 23:28:00 +0000

TL;DR:

I run several "dedibox" servers at online.net, all powered by OpenBSD.
OpenBSD is not officially supported so you have to work-around.
Running full-disk encrypted OpenBSD there is a piece of cake.
As a bonus, my first steps within a brand new booted machine ;-)

Step #0: choosing your server
#

OpenBSD is not officially supported, I can’t guarantee that this will work for you on any kind of server online.net provides, however I’ve been running https://poolp.org on OpenBSD there since 2008, only switching machines as they were getting a bit old and new offers came up.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

spfwalk

Mon, 08 Jan 2018 17:19:00 +0000

TL;DR:

deraadt@ thought it would be nice to have a spf fetch utility in base.
Aaron Poffenberger wrote a shell-based `spf_fetch` utility.
I wrote a C-based `spfwalk` utility that's `pledge()`-ed.
The `spfwalk` utility got merged to `smtpctl`.

What’s SPF in a few words
#

SPF is the Sender Policy Framework, a standard to verify the domain name of an e-mail sender.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

News from the front !

Mon, 08 Jan 2018 12:11:00 +0000

TL;DR:

Came very close to a burn out late 2016, had to quit former employer.
Started working at another company early 2017.
Became a student again, currently halfway through second year in psychology.
Haven't done much opensource since early 2017, slowly resuming.

Happy new year !
#

I wish you a very happy new year 2018 and hope that you succeed in whatever you attempt.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

OpenSMTPD 6.0.0 is released !

Mon, 12 Sep 2016 08:00:00 +0000

TL;DR:

We just released OpenSMTPD 6.0.0 and it's quite different from former releases.
Turns out most of the changes are not visible.

A featureless release
#

I managed to wrap the 6.0.0 release yesterday.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

Home, sweet home

Tue, 22 Dec 2015 09:53:01 +0000

TL;DR:

OpenSMTPD on github no longer diverges from OpenBSD.

Since last episode
#

Sometime this year, we released OpenSMTPD 5.7.1 which was the first version that shipped with the long-awaited experimental filters support. The result of over a year and a half of very very deep refactor in our IO layer and the addition of a very elegant but also very tricky new API.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

The state of filters

Fri, 12 Dec 2014 16:56:24 +0000

TL;DR:

yeeeees, filters are coming. don't believe us ? here's an example. be patient.

On my death bed
#

On my death bed, when my life flashes before my eyes and I start recalling what people have told me during my (hopefully long) lifetime, these sentences will single out:

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

Some OpenSMTPD overview, part 3

Wed, 10 Dec 2014 12:38:26 +0000

EHLO,

This is the third post of a series about OpenSMTPD improvements that have taken place since this summer.

Content altering
#

For a long time, we have developed OpenSMTPD with a strict rule that the daemon should not alter DATA (as in the DATA SMTP phase) in any way.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

Some OpenSMTPD overview, part 2

Mon, 01 Dec 2014 09:04:11 +0000

Why we killed the MFA (filter) process
#

For as long as I can remember, a process called MFA was created by OpenSMTPD at start time.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

Some OpenSMTPD overview, part 1

Wed, 26 Nov 2014 14:25:12 +0000

EHLO world !
#

Yesterday I thought I’d write a first OpenSMTPD-related post to sum up the changes that have happened since this summer but it turned out to be painful as they amount to quite a lot. Instead, I think a better strategy is to split this into a serie of smaller posts focused on the specific changes ;-)

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

what the fsck did just happen

Mon, 24 Nov 2014 18:01:51 +0000

Good news everyone !

With last post dating from almost a year, we can all agree that I’ve outpassed my slacking skills by a great margin and I probably deserve an award of some kind ;-)

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

News-from-the-front

Sat, 14 Dec 2013 21:36:40 +0000

EHLO readers,

This blog post is the first since a few months, I’ve been busy and struggling with some personal health and familial issues. I won’t share them here as its not really something anyone can help with, so… let’s focus on OpenSMTPD !

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

OpenSMTPD improvements summary

Sat, 14 Dec 2013 21:36:40 +0000

Hey,

No OpenSMTPD news since almost a month… time to break the trend !

As far as I’m concerned, I’ve been busy with other work but still a git log shows that between Eric and I we have accumulated quite a few things during this month. Below is a short non-exhaustive summary of changes and news.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

OpenSMTPD: table_proc, queue_proc, crypto queue and other stuff

Fri, 26 Apr 2013 18:42:36 +0000

Yop,

This week has been very productive with several tickets closed and more about to be closed.

Eric has done an amazing work as you will soon realize ;-)

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

News from the front

Sun, 21 Apr 2013 17:15:21 +0000

OHAI,

I have not updated this blog since the release of OpenSMTPD 5.3, over a month ago. In the meantime, some minor bugs have been fixed and we have released OpenSMTPD 5.3.1.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

OpenSMTPD 5.3 released

Sun, 17 Mar 2013 19:08:55 +0000

OHAI !

I’ve stayed silent for the last month as we got ready for the big thing…

Charles, Eric and I are proud to announce the release of OpenSMTPD 5.3, our first official production-ready release !

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

OpenSMTPD: minor fixes + preparing release

Sat, 02 Feb 2013 12:54:36 +0000

OHAI,

We had planned to slow down a bit to prepare for release: no more feature, no more invasive changes until we tag something out of which we can publish a release. I then discussed with Bret Lambert (blambert@) and he asked me if we used some kind of code scanner to detect defects in our code.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

OpenSMTPD: gentlemen, fasten your seatbelt

Fri, 25 Jan 2013 23:01:47 +0000

OHAI,

Lately we have stabilized and decided that we’re okay with the features we have for our first release, this time for good, so we focused on making sure that we didn’t introduce regressions and that we were rock solid.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

OpenSMTPD: stress and features

Fri, 18 Jan 2013 22:11:07 +0000

<p>Hey,</p>

I wanted to publish something last Friday but I unfortunately got my hands on a copy of Super Nintendo's Zelda which led to an instant loss of motivation.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

Welcome to you, 2013

Tue, 08 Jan 2013 23:16:43 +0000

YO!

I know I should have posted a “Happy New Year” note earlier but you know how it is: new year eve’s aftermath, days to recover, work resumes, mood slacks, bleh.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

OpenSMTPD: SSL & relay stuff

Fri, 28 Dec 2012 20:11:23 +0000

OHAI,

I was unable to write a story last week as my desk broke into pieces for no apparent reason but my foot hitting it accidentally.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

OpenSMTPD: LDAP support, selectable source, DKIM and Goodies

Fri, 14 Dec 2012 21:43:44 +0000

<p>OHAI,</p>

This week has been crazy, my brain melted a little as I worked on filters, it melted a little as I worked on LDAP and it melted a little more as I tried to trick Eric into working on filters with me (yes, that actually worked :-).

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

OpenSMTPD: fully virtual setups, updated DNS & MTA code, SQLite support

Fri, 07 Dec 2012 21:17:57 +0000

OHAI,

This week I had intended to work on filters. After 3 days of pain and swearing, even though it did move forward, I finally decided to step back for a few days and work on something else to preserve my sanity.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

OpenSMTPD: more features, more cleanup, more more

Fri, 30 Nov 2012 22:13:25 +0000

OHAI,

First of all, on a completely unrelated note, I’d like to emphasize that this blog post is being written from my text editor launched by a little shell and pushed to poolp using the Ocean API. I can be web2.0 from console and emacs, and that’s definitely worth a mention ;-)

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

News from the front

Sat, 17 Nov 2012 13:28:58 +0000

Almost a month since my last post… I know, I know.

So I left my position at Scality two weeks ago. I had been there for a year and a half working on a very interesting and tricky project. I will miss my colleagues and the discussions we had on all kinds of topic, I hope them the best future and that we will be able to share beers again ;-)

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

OpenSMTPD: crypto/compress fixes and import initial stab at LDAP

Fri, 31 Aug 2012 15:21:39 +0000

The crypto backend that has been committed a couple days ago started a little discussion and it was decided to switch the default cipher from Blowfish to AES-128 and make it a default.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

OpenSMTPD: crypto_backend and encrypted queue

Wed, 29 Aug 2012 10:21:59 +0000

A few days ago, Charles committed the compress_backend API which allowed transparent deflation/inflation of envelopes and messages as they hit the queue.

The compression code is executed before the queue_backend gets the data so that any queue_backend can benefit transparently from compression without having to add any code to handle it. Due to our design, this also means that if the queue_backend stores envelopes and messages remotely, then the compression will take place before sending and after fetching, the remote end only ever sees compressed data.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

OpenSMTPD: I have no idea for that title, sorry

Sun, 26 Aug 2012 22:53:03 +0000

Howdie,

Eric and I had planned a loooooong time ago to have a hackathon this week-end. However, some asshole piece of shit ran into my car while it was parked, made it unable to take the road and flee without leaving a note. Long story made short, I had to be at the repair shop this week-end to be able to get my car before end of September.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

OpenSMTPD: plenty of news

Tue, 21 Aug 2012 22:22:00 +0000

It’s been over a month since my last post but I have an excuse: I was super busy, then I was super on vacation … but I’m back again ;-)

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

g2k12: OpenBSD hackathon - part II

Sun, 15 Jul 2012 21:43:58 +0000

Yesterday, I came back from Budapest and was too tired to write anything, but here’s a quick summary of all the features that have been implemented with regard to OpenSMTPD by Eric, Charles and I.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

g2k12: OpenBSD hackathon

Mon, 09 Jul 2012 23:52:31 +0000

Yesterday, after nearly missing my plane by 5 minutes, I finally managed to make it to Budapest for g2k12, the OpenBSD general hackathon.

While this is not my first hackathon, this is the first general one with many hackers working on all kinds of subsystems ranging from ports to network and kernel. It’s fun to see many people focused on improving different areas which you use daily, sometimes without even noticing, and doing it with as much fun as you are having fixing your own area ;-)

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

OpenSMTPD: development, bug tracker & GitHub

Tue, 19 Jun 2012 19:57:37 +0000

It’s been a while since my last post about OpenSMTPD.

I don’t know what Eric and Charles have been up to, I was quite busy with my daytime job and couldn’t really spend much time on the hobby ;-)

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

OpenSMTPD REST queue

Wed, 06 Jun 2012 14:44:10 +0000

This is the first post of a series to illustrate and describe a “proof of concept” code by Charles, Eric and I. I will describe the features as they are implemented.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

OpenSMTPD: src-address maps and spamhaus

Thu, 17 May 2012 17:23:09 +0000

First of all, I’d like to “thank” The Spamhaus project which forced me into hacking this feature in a hurry.

See, I rent a server at online.net which I use for OpenSMTPD live testing and to run some experimental code before it hits the OpenBSD tree.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

OpenSMTPD relay maps & new url syntax

Mon, 14 May 2012 09:55:52 +0000

When we first started working on OpenSMTPD, we planned for future features but we did not necessarily start integrating them right away as the goal was to bootstrap the project first with basic features.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

OpenSMTPD, map_compare() and K_NETADDR

Sun, 13 May 2012 03:09:16 +0000

Ok, I already posted about the new SQLite map_backend earlier today but it turns out that I’ve been very productive, and it was worth another post ;-)

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

OpenSMTPD meets SQLite

Sat, 12 May 2012 14:23:54 +0000

During the r2k12 hackathon in Paris, Marc Espie committed SQLite to OpenBSD’s base system.

This has the side effect that OpenSMTPD can start using it and while we agreed that we did not want it as a strong dependency, the various backends API allow us to make it a soft dependency that can be removed without breaking the daemon if someone really does not want SQLite linked.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

Some OpenSMTPD news

Wed, 09 May 2012 23:03:36 +0000

It’s been a whiiiiiiile since my last OpenSMTPD related post. Time to break the slacking, blog-wise.

Unlike what would appear from the outside, there’s been a lot of activity, discussions and planning, I’ll address some here and will discuss it further soon.

I take short consulting engagements — architecture review, technical due diligence, mail infrastructure — through aljuna.tech.

Posts on poolp.org

OpenBSD 8.0 on a Scaleway Instance

Here we go again… #

Preventive software maintenance

Where this comes from #

Out of my cave, lots of updates

Why the silence ? #

2023, a retrospective.

2023 was a rough year #

Plakar: an avalanche of changes

A ton of refactors #

Plakar: a TON of changes

Optimized go-fastcdc #

Plakar: vfs importer interface

Building my own guitar, part 4

Working on the head #

Plakar: snapshot forking and tagging

Plakar is not only for backups #

Implementing a system call for OpenBSD

Disclaimer #

Meet ChatGPT, the New AI Sidekick Helping Gilles!

Building my own guitar, part 3

The neck #

2023-Q2: music, unity, xgb, jujulang, setdb and opensmtpd

First of all, a new website #

Building my own guitar, part 2

The neck #

Building my own guitar, part 1

About this project #

A new section appeared !

This blog is a musical blog too #

March 2023: Melodya, MHL, MIDI-csv and more...

Code-unrelated work #

I love you

December 2022: some more earmuff and go-harmony

Re-focusing on go-harmony #

November 2022: feedchain, go-harmony, dart-harmony and harmonee

Music-related stuff #

Feedchain is a standalone news feed project

This is not my activity report #

October 2022: blog comments, a bit of plakar and the streamchain project

Learnt myself some Swift #

June 2022: go-harmony and earmuff

Code-unrelated work #

May 2022: yet again, tons of plakar stuff

Code-unrelated work #

April 2022: plakar.io, plakar refactor and ssh support

The plakar.io website #

April 2022: plakar keys and UI stuff

Reworked plakar keys #

March 2022: plakar clone and plakar sync

Slacked a bit #

Farewell 2021, Welcome 2022: a personal post

2021 was a good year overall #

December 2021: a bit of plakar, a bit of go-fastcdc and some useless stuff

This activity report will be short #

November 2021: a bit of go-ipcmsg, a bit of go-privsep and a ton of plakar

Go-ipcmsg #

October 2021: mostly Plakar

I have a discord now #

August 2021: taking a break

Why so calm ? #

April 2021: OpenSMTPD, plakar, ipcmsg, privsep and a small hypnosis talk

Let’s start with some LoFi #

March 2021: backups with Plakar

Let’s start with some LoFi #

February 2021: nooSMTPD libtls-conversion, ciphers, curves and protocols

Let’s start with some LoFi #

January 2021: OpenSMTPD libtls conversion and UNIX-domain sockets support, nooSMTPD

Let’s start with some LoFi #

Writing a custom Mail Delivery Agent

What is a Mail Delivery Agent (MDA) ? #

December 2020: OpenSMTPD 6.8.0p1 released, fixed several bugs, proposed several diffs, book is on Github

Let’s start with some LoFi #

November 2020: I wasn't slacking but no opensource work

I tanked a year in work psychology #

July 2020: webmail, custom MDA and python framework work

Worked on my webmail #

June 2020: poolp.org, folder pinning and webmail work

poolp.org infrastructure rework #

Here we go again…
#

Where this comes from
#

Why the silence ?
#

2023 was a rough year
#

A ton of refactors
#

Optimized `go-fastcdc`
#

Working on the head
#

Plakar is not only for backups
#

Disclaimer
#

The neck
#

First of all, a new website
#

The neck
#

About this project
#

This blog is a musical blog too
#

Code-unrelated work
#

Re-focusing on go-harmony
#

Music-related stuff
#

This is not my activity report
#

Learnt myself some Swift
#

Code-unrelated work
#

Code-unrelated work
#

The plakar.io website
#

Reworked plakar keys
#

Slacked a bit
#

2021 was a good year overall
#

This activity report will be short
#

Go-ipcmsg
#

I have a discord now
#

Why so calm ?
#

Let’s start with some LoFi
#

Let’s start with some LoFi
#

Let’s start with some LoFi
#

Let’s start with some LoFi
#

What is a Mail Delivery Agent (MDA) ?
#

Let’s start with some LoFi
#

I tanked a year in work psychology
#

Worked on my webmail
#

poolp.org infrastructure rework
#

Webmail vs mutt
#

This is a weird report
#

What happened ?
#

No shiny feature this month, ungrateful work
#

Where did you read this already ?
#

SMTP failures in a nutshell
#

Got myself a pinebook pro
#

How I landed in the emergencies
#

Welcome Jules, `fork()` completed
#

EDIT (2019-10-26)
#

EDIT (2019-12-15)
#

Shout outs to my patrons !
#

Shout outs to my patrons !
#

Thanks to my patrons !
#

This is the first report
#

Generalized anxiety disorder and alexithymia.
#

K_REGEX lookups
#

A bit of short-sighted history
#

fc-rDNS
#

Reporting
#

Switching from old config to new config
#

Anatomy of a design error
#

Step #0: choosing your server
#

What’s SPF in a few words
#

Happy new year !
#

A featureless release
#

Since last episode
#

On my death bed
#

Content altering
#

Why we killed the MFA (filter) process
#

EHLO world !
#