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Courier IMAP and auto deleting trash after 7 days

· Apple, Errors, Linux, Networking, Software

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: