On Feb 18, 2025, at 05:59, Doug via dovecot <dovecot@dovecot.org> wrote:
My experience was very similar when I originally set up doveadm backup from my production machine to my backup machine. My mailbox was the only one on the system that failed. I discovered the root cause was a cron job running on the backup machine delivering its output to my email. The result was my inbox was out of sync. Perhaps you also have something on your backup machine that is altering the email.
-- also Doug
Good catch. That was the problem. Interestingly enough, the new emails from cron were in the new directory, not cur. Doveadm was trying to delete cur which obviously didn't fix the problem. Deleting the contents of new then let the backup work properly. I'm not sure my fix to crontab will completely eliminate those email, but at least I know what the problem is and can eventually eliminate it. Thanks
-- Doug (good name)