// REFERENCE
Port 110 (POP3)
Protocol: TCP
Service: POP3
High risk
POP3: mail retrieval without encryption. Its secure version is POP3S (995). IMAP (143/993) is more common today; avoid plaintext 110.
Related tools
Work with this in:
Related
25
Port 25 (SMTP) 143
Port 143 (IMAP) 465
Port 465 (SMTPS) 587
Port 587 (SMTP submission) 993
Port 993 (IMAPS) 995
Port 995 (POP3S)
Port 25 (SMTP) 143
Port 143 (IMAP) 465
Port 465 (SMTPS) 587
Port 587 (SMTP submission) 993
Port 993 (IMAPS) 995
Port 995 (POP3S)
Assignments per the IANA port registry. Educational content.