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feat: Automatic per-user quota-preservation.

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Replace daily timer-based message expire script
with Dovecot quota-warning-triggered cleanup.
When a user reaches 90% of their mailbox quota
Dovecot calls the new script which removes the largest and oldest messages
until usage drops below 80%.

The daily `chatmail-expire` service now only
handles deletion of inactive user mailboxes.
This commit is contained in:
holger krekel
2026-04-18 01:27:48 +02:00
parent 0aa08b7413
commit fb80f23cfd
12 changed files with 303 additions and 83 deletions
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16
doc/source/overview.rst
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@@ -102,8 +102,14 @@ 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 entire mailboxes of users who have not logged in
for longer than ``delete_inactive_users_after`` days.
- `chatmail-quota-expire <https://github.com/chatmail/relay/blob/main/chatmaild/src/chatmaild/quota_expire.py>`_
is called by Dovecot's ``quota_warning`` mechanism when a
user reaches 90% of their mailbox quota.
It removes the largest and oldest messages
until usage drops below 80% of the quota.
- `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
@@ -139,7 +145,7 @@ Chatmail relay dependency diagram
certs-nginx[("`TLS certs
/var/lib/acme`")] --> nginx-internal;
systemd-timer --- acmetool;
systemd-timer --- chatmail-expire-daily;
systemd-timer --- chatmail-expire-inactive;
systemd-timer --- chatmail-fsreport-daily;
acmetool --> certs[("`TLS certs
/var/lib/acme`")];
@@ -156,9 +162,11 @@ 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;
chatmail-expire-inactive --- maildir;
chatmail-fsreport-daily --- maildir;
chatmail-metadata --- iroh-relay;
chatmail-metadata --- |encrypted device token| notifications.delta.chat;