In a similar post I described what to do in case your IMAP server crashes and it still behaves well. This time, though, Cyrus crashed and burned beyond recognition, and there was nothing I could do to save the databases. All utilities in the books simply told me the db files were corrupt, and I should run recovery. I ran recovery, and nothing happened…
This time I found a two-way approach helped a lot: first, I instituted nightly backups of my email server, and keep the last three days, three weeks, and three months on file.
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