SMTP/IMAP/POP

Port	Service
TCP/25	SMTP Unencrypted
TCP/143	IMAP4 Unencrypted
TCP/110	POP3 Unencrypted
TCP/465	SMTP Encrypted
TCP/587	SMTP Encrypted/STARTTLS
TCP/993	IMAP4 Encrypted
TCP/995	POP3 Encrypted