[BlueOnyx:03230] Dovecot logins fail suddenly

[Robert Fitzpatrick]

Every few weeks, logins for Dovecot POP3 and IMAP start failing all of a 
sudden. I thought it was time related as they mostly occur in the early 
morning hours, but once it happened during the day. I see authentication 
errors in the mail log for all users, restart saslauthd and dovecot, all 
is well again. This has happened 3 or 4 times now, does anyone know what 
causes this issue?

--Robert