From the logs of the mail server:========================client: challengeserver: answerclient: request fetchserver: replies wwith flags, email indexes..server: replies that there are three messagesthen: auth plain failedSo, it looks like that first the client connects using POP+SSL and authenticates correctly, and gets the list of messages.Then the client (osTicket) tries to fetch the messages, but it fails because it tries to plain auth (no encription).Any hints? It looks like a bug..When fw will let tcp/993 out, I'll try to use imap+ssl instead of pop+ssl, but until then, I'm can only use pop+sslThank you and best regardsRobi