Port 995 supports POP3S and pop3s (UDP reference coverage) across distinct transports. Review each protocol before writing firewall or monitoring policy.
POP3 mailbox retrieval protected by implicit TLS.
Legacy mail clients securely downloading messages.
Client to server
Validate certificates and use strong account authentication; IMAP is generally better suited to multi-device synchronization.
pop3s (UDP reference coverage) is documented as a network service convention for port 995 over UDP.
Use this reference entry when identifying or validating systems documented to use 995/UDP.
Varies
Confirm the listening process and current vendor documentation before permitting traffic; a listed convention does not prove the active service or its security posture.