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georglauterbach · 2025-08-02T13:04:29Z

Description

Important

This PR is currently a draft. We can use it to adopt changes with the upcoming release of Debian 13 early. We will not be merging this PR before Debian 13.1 has been released, approximately in September, 2025.

Maintainers are welcome to contribute to this PR. No need to ask for permission :)

This PR updates our base image to Debian 13. This includes the following changes

updates to the Dockerfile's FROM directive
updates to package.sh
- updated VERSION_CODENAME
- moved early functionality from Dockerfile because adduser now needs to be installed first
- fixed LZ4 package name for Amavis
- added fallback for DOVECOT_COMMUNITY_REPO:-0
- disabled Rspamd upstream repository
(WIP) Dovecot adjustments for Dovecot CE 2.4.x (see [TODO]: Dovecot 2.4.0 compatibility #4447)

Open Tasks

[TODO]: Dovecot 2.4.0 compatibility #4447
- plugins section still exist
- not all passdb definitions were updated

Closes Issues

Closes #4447
Fixes #4466
Resolves #4512

Type of change

Update
Breaking change (fix or feature that would cause existing functionality to not work as expected)
This change requires a documentation update

Checklist

My code follows the style guidelines of this project
I have performed a self-review of my code
I have commented my code, particularly in hard-to-understand areas
I have made corresponding changes to the documentation (README.md or the documentation under docs/)
If necessary, I have added tests that prove my fix is effective or that my feature works
New and existing unit tests pass locally with my changes
I have added information about changes made in this PR to CHANGELOG.md

Signed-off-by: Georg Lauterbach <[email protected]>

This is required because `adduser` is not available by default on Debian 13. Signed-off-by: Georg Lauterbach <[email protected]>

Signed-off-by: Georg Lauterbach <[email protected]>

Error as posted by Postfix: ```txt postconf: warning: /etc/postfix/main.cf: support for parameter "smtpd_tls_dh1024_param_file" will be removed; instead, do not specify (leave at default) ``` Signed-off-by: Georg Lauterbach <[email protected]>

Signed-off-by: Georg Lauterbach <[email protected]>

ref: #4536 (comment) Signed-off-by: Georg Lauterbach <[email protected]>

Signed-off-by: Georg Lauterbach <[email protected]>

georglauterbach · 2026-02-08T17:38:40Z

I have tackled the following:

Actionables:

Dovecot UserDB update should probably match existing DMS config (regarding %{user}), with a separate follow-up PR for better traceability? (bundling it with the Dovecot 2.3 => 2.4 upgrade would not be as git blame friendly for troubleshooting if required)

Correct the mail_path migration of the shorthand vars from Dovecot 2.3 to the appropriate 2.4 vars.

Same for mail_home.

Cherry-pick / extract some changes that are not mandatory to this PR to minimize review burden and better isolate unrelated changes to the base image upgrade.

Clarify some changes.

Which changes would you like to see clarified @polarathene? I think the Dovecot changes might not be complete yet (#4447 ?) and the TLS related changes are also not complete I think.

These tasks are still open:

[TODO]: Dovecot 2.4.0 compatibility #4447
- plugins section still exist
- not all passdb definitions were updated

FYI I have also hid some comments so that the PR discussion is easier to digest for me.

correct passdb entires for master and normal DBs Signed-off-by: Georg Lauterbach <[email protected]>

Signed-off-by: Georg Lauterbach <[email protected]>

polarathene · 2026-02-15T21:30:03Z

Sorry I've not chimed in yet, I am really stretched atm and providing review for this PR will require me to block out enough time to acquire the context needed. I will aim to do that before March, hopefully sometime this week.

Hugely appreciate you taking the time to tackle this task thus far, I know it's not an enjoyable one ❤️

georglauterbach · 2026-02-15T22:07:29Z

Sorry I've not chimed in yet, I am really stretched atm and providing review for this PR will require me to block out enough time to acquire the context needed. I will aim to do that before March, hopefully sometime this week.

I'd definitely appreciate you helping me with the TLS parts since you're more involved :)

Hugely appreciate you taking the time to tackle this task thus far, I know it's not an enjoyable one ❤️

The Dovecot shenanigans drive me crazy. Other than that, it's the usual ordeal, just really much at once this time.

Signed-off-by: Georg Lauterbach <[email protected]>

georglauterbach · 2026-02-21T16:08:45Z

I have added the next chunk of updates. It really is a chore working through Dovecot. I've hit a wall for today with global sieve scripts. Some more tests are now passing properly, though.

github-actions · 2026-02-21T16:09:59Z

Documentation preview for this PR is ready! 🎉

Built with commit: e84ff9d

georglauterbach added this to the v16.0.0 milestone Aug 2, 2025

georglauterbach requested review from casperklein and polarathene August 2, 2025 13:04

georglauterbach self-assigned this Aug 2, 2025

georglauterbach added the priority/high label Aug 2, 2025

georglauterbach added this to DMS Features & Tasks Aug 2, 2025

georglauterbach added area/scripts area/features area/documentation area/configuration (file) kind/update Update an existing feature, configuration file or the documentation labels Aug 2, 2025

georglauterbach moved this to Implementation Phase in DMS Features & Tasks Aug 2, 2025

georglauterbach marked this pull request as draft August 2, 2025 13:05

georglauterbach changed the title ~~draft: chore: Debian 13~~ chore: update to Debian 13 Aug 2, 2025

georglauterbach mentioned this pull request Aug 4, 2025

update: drop support for DHE params #4538

Open

4 tasks

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georglauterbach force-pushed the debian-13 branch 2 times, most recently from ae4efa5 to 73ca10c Compare August 17, 2025 09:56

georglauterbach mentioned this pull request Aug 18, 2025

chore(deps): Bump debian from 12-slim to 13-slim #4561

Closed

github-actions bot added the meta/stale This issue / PR has become stale and will be closed if there is no further activity label Sep 8, 2025

docker-mailserver deleted a comment from github-actions bot Sep 8, 2025

polarathene added stale-bot/ignore Indicates that this issue / PR shall not be closed by our stale-checking CI and removed meta/stale This issue / PR has become stale and will be closed if there is no further activity labels Sep 8, 2025

georglauterbach mentioned this pull request Sep 9, 2025

remove: Diffie-Hellman parameters for Postfix & Dovecot #4562

Draft

10 tasks

polarathene mentioned this pull request Sep 14, 2025

fix: Postfix: disable_dns_lookups => smtp_dns_support_level #4568

Merged

8 tasks

polarathene mentioned this pull request Oct 30, 2025

[TODO]: Dovecot 2.4.0 compatibility #4447

Open

11 tasks

chore: switch to Debian 13

5e9bf7c

Signed-off-by: Georg Lauterbach <[email protected]>

georglauterbach and others added 15 commits February 8, 2026 18:21

chore: update VERSION_CODENAME in packages.sh

ec0d014

Signed-off-by: Georg Lauterbach <[email protected]>

fix: move early instructions into packages.sh

fdd038c

This is required because `adduser` is not available by default on Debian 13. Signed-off-by: Georg Lauterbach <[email protected]>

fix: update package name for LZ4 compat package

665a119

Signed-off-by: Georg Lauterbach <[email protected]>

fix: set proper default for DOCECOT_COMMUNITY_REPO in packages.sh

e18f4de

Signed-off-by: Georg Lauterbach <[email protected]>

chore: do not use Rspamd community repo as of now

d312531

Signed-off-by: Georg Lauterbach <[email protected]>

chore: Dovecot: disable_plaintext_auth => auth_allow_cleartext

5013d0c

Signed-off-by: Georg Lauterbach <[email protected]>

fix: Dovecot: ssl config

dd8ae22

Signed-off-by: Georg Lauterbach <[email protected]>

fix: Dovecot: adjust mail_plugins

5c7a40e

Signed-off-by: Georg Lauterbach <[email protected]>

fix: Dovecot: split mail_location

944d4d0

Signed-off-by: Georg Lauterbach <[email protected]>

fix: Dovecot: remove verbose_ssl

11adc60

Signed-off-by: Georg Lauterbach <[email protected]>

chore: Dovecot: adjust main auth-passwd.inc file

0911547

Signed-off-by: Georg Lauterbach <[email protected]>

Apply suggestions from code review

c994797

chore: apply feedback from @polarathene

681ea11

ref: #4536 (comment) Signed-off-by: Georg Lauterbach <[email protected]>

chore: revert change not specific to the migration

f3a46e5

Signed-off-by: Georg Lauterbach <[email protected]>

georglauterbach force-pushed the debian-13 branch from 73ca10c to f3a46e5 Compare February 8, 2026 17:37

georglauterbach requested a review from polarathene February 8, 2026 17:39

georglauterbach added 4 commits February 15, 2026 14:25

chore: progress

1f0b8be

correct passdb entires for master and normal DBs Signed-off-by: Georg Lauterbach <[email protected]>

chore: continue with Dovecot quota check

c3b727a

Signed-off-by: Georg Lauterbach <[email protected]>

chore: more Dovecot quota setting adjustments

485f851

Signed-off-by: Georg Lauterbach <[email protected]>

chore: continues with Sieve plugins for Dovecot

5f64f08

Signed-off-by: Georg Lauterbach <[email protected]>

chore: progress

e84ff9d

Signed-off-by: Georg Lauterbach <[email protected]>

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chore: update to Debian 13#4536

chore: update to Debian 13#4536
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georglauterbach commented Aug 2, 2025 •

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