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feat: automatic oldest-first message removal from mailboxes to (almost) always stay under max_mailbox_size

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Both dovecot-quota-threshold triggers and the daily expiry routine
will now expunge oldest messages from mailboxes automatically
when the mailbox reaches 75% of max_mailbox_size.
Delta Chat users should not see any warnings (at 80/95 percent) or bounce messages,
and existing over-quota mailboxes should start receiving mails again.
This commit is contained in:
holger krekel
2026-04-18 17:08:21 +02:00
parent 6c18d37772
commit a65f082817
10 changed files with 214 additions and 13 deletions
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10
doc/source/overview.rst
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@@ -102,8 +102,12 @@ short overview of ``chatmaild`` services:
Apple/Google/Huawei.
- `chatmail-expire <https://github.com/chatmail/relay/blob/main/chatmaild/src/chatmaild/expire.py>`_
deletes users if they have not logged in for a longer while.
The timeframe can be configured in ``chatmail.ini``.
deletes old messages, large messages, and entire mailboxes
of users who have not logged in for longer than
``delete_inactive_users_after`` days.
- ``chatmail-quota-expire`` is called by Dovecot's ``quota_warning`` mechanism
and will automatically remove oldest messages to keep mailboxes well under ``max_mailbox_size``.
- `lastlogin <https://github.com/chatmail/relay/blob/main/chatmaild/src/chatmaild/lastlogin.py>`_
is contacted by Dovecot when a user logs in and stores the date of
@@ -156,6 +160,8 @@ Chatmail relay dependency diagram
/home/vmail/.../user"];
dovecot --- |lastlogin.socket|lastlogin;
dovecot --- chatmail-metadata;
dovecot --- |quota-warning|chatmail-quota-expire;
chatmail-quota-expire --- maildir;
lastlogin --- maildir;
doveauth --- maildir;
chatmail-expire-daily --- maildir;