On 2. Feb 2026, at 12.31, Christian Kivalo via dovecot <dovecot@dovecot.org> wrote:
On 2026-02-02 09:09, Timo Sirainen via dovecot wrote:
Hi, On 26. Jan 2026, at 14.13, Christian Kivalo via dovecot <dovecot@dovecot.org> wrote:
the ipad logged in again and caused ~100 panics. Logging with log_debug=category==imap or category=sieve. I can provide the coredump if needed. A core dump for this crash would be helpful, since it's not easily reproducible. Please send it to me privately timo.sirainen@open-xchange.com <mailto:timo.sirainen@open-xchange.com> using the tarball generated by dovecot-sysreport --core /path/to/core.
Hi, I sent you the dovecot-sysreport tarball.
Thanks. I can now reproduce. The crash happens (at least) when:
- imapsieve action is for COPY
- source message has no $HasAttachment or $HasNoAttachment flags
- mail_attachment_detection_options contains add-flags (nowadays the default)
So for now the workaround would be to set mail_attachment_detection_options to empty value. Or trigger some doveadm command to update attachment flags to all existing mails (I think doveadm fetch imap.bodystructure or maybe body.1 would work).