====== E-Mail - Ports ======

^ Port      ^ Protocol ^ Description       ^
| 25/tcp    | SMTP     | Used for communication between servers, for relaying and delivering mails. This connection can be upgraded to an encrypted connection by using STARTTLS |
| 110/tcp   | POP3     |  |
| 143/tcp   | IMAP     |  |
| 465/tcp   | -        | Deprecated, never really used, configured like port 25/tcp on some servers | 
| 587/tcp   | SMTPS    | Used by e-mail client |
| 993/tcp   | IMAPS    |  |
| 995/tcp   | POP3S    |  |