Hi,
I’m seeing the same issue after upgrading to Dovecot 2.4.2.
I reproduced it with both the Alpine Linux build and the official Dovecot
Docker image referenced at [1].
In my case, the crash correlates strongly with iOS devices auto-deleting older
messages from the Trash folder. As Christian described, it starts after a
larger number of IMAP MOVE operations.
Key finding: when I disable the imap_sieve extensions, the crashes stop.
Personal Sieve rules continue to work as expected, so the problem appears to be
specific to imap_sieve (or its interaction with frequent MOVE operations).
> sieve_plugins {
> sieve_imapsieve = no
> }
>
> protocol imap {
> mail_plugins {
> imap_sieve = no
> imap_filter_sieve = no
> }
> }
My configuration with the enabled imap_sieve extension is located at [2].
Kind regards
Jeff
[1]: https://github.com/dovecot/docker
[2]:
https://github.com/jeboehm/docker-mailserver/blob/7433443ebd4af1c422cb4030ceffe62b248812be/target/mda/rootfs/etc/dovecot/conf.d/90-sieve.conf
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