Courier IMAP and auto deleting trash after 7 days
E-mails that had been deleted for over 7 days were automatically removed from the IMAP server. E-mail date was ignored (ie the mail could have been from 2010; the actual time in “Trash” counted). This didn’t happen to other folders (Sent, Archive, Spam). This recently happened and hadn’t happened before.
I had to restore my trash folder from backups every 7 days (yay for rdiff-backup).
It took me a while to figure it out… The problem first appeared in October, right after several big changes: