So I've just yolo'd the dreaded #dovecot v2.3 => v2.4 upgrade on a Friday afternoon and to my surprise, it was pretty smooth. I have a very simple setup though: only system users, maildir folder in home directory, system authentication via pam. Here's what I did:
1. Pieced together a new minimum viable config from the official docs (10 mins)
2. Checked my old config for settings not accounted for in the new config: …
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