[elvey]

Undelete doesn't work if the email undeleted was filed into trash by Rules (Sieve) in the first place. It's moved in some sense; it momentarily disappears and then reappears.

Use case: I have some email sent to [entity+trash@alias.fastmail.domain]. Sieve sees the 'trash" and puts it in the trash. Occasionally there's something useful, so I go search for it. I undeleted something and was then about to empty the trash (well, a folder in the trash) when I realized that the email I had undeleted was still in the same folder in the trash. (It wasn't actually an important email, but I didn't want to delete it.)

If staff wants to look at it:
Message-ID: <7d9370aedbb543e492d53c596ef3d40e@1236759688>