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I've got a user with an unusable account. Tbird just sits in a loop endlessly logging in over and over when a particular folder is selected. What files under .imap associated with that folder can be safely deleted? What's stored in all of them? I see all of these: .customflags dovecot.index dovecot.index.cache dovecot.index.log .imap.index .imap.index.data .imap.index.log