Unterstützte Protokolle auf dem Server (surbtal.net)
| Port 25 | smtp mta | incoming mail to postfix |
| Port 110 | pop3 | mailbox / proxy POP |
| Port 143 | imap | mailbox / proxy |
| Port 443 | https | mailbox / proxy – web mail client HTTP over TLS |
| 465 | smtps | mta Incoming mail to postfix over TLS (Legacy Outlook only? If possible, use 587 instead) |
| 587 | smtp | mta Mail submission over TLS |
| 993 | imaps | mailbox / proxy IMAP over TLS |
| 995 | pop3 | mailbox / proxy POP3 over TLS |