Hi Jan, > Aug 24 04:16:31 d90 tls_prune[15289]: mydelete: starting txn 2157892271 > Aug 24 04:16:31 d90 tls_prune[15289]: mydelete: aborting txn 2157892271 As you found out yourself, the solution is to delete the tls db, (/var/lib/cyrus/tls_sessions.db in my case) and restart cyrus. Another question is how and why the db got corrupted. Regards, D.