Installing and uninstalling the mail servers

This section describes installation and uninstallation of the SMPT server (Postfix server) and of the IMAP and POP3 servers.

By default, the mail servers are assigned the following port numbers:

Port		Protocol	Explanation
25	tcp/udp	SMTP	Simple Mail Transfer Protocol
465	tcp/udp	SMTPS	SMTP e-mail submission via implicit TLS
587	tcp/udp	SMTP	SMTP e-mail submission via explicit TLS
110	tcp/udp	POP3	Post Office Protocol - Version 3
143	tcp/udp	IMAP	Internet Message Access Protocol
993	tcp/udp	IMAPS	IMAP via implicit TLS
995	tcp/udp	POP3S	POP3 via implicit TLS