IPFYI
:465 (TCP)

SMTPS

Low Risk

TCP — Email

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Port Overview

Port Number 465
Service Name SMTPS
Transport Protocol TCP
Category Email
Security Risk Low
Port Range Well-Known (0-1023)

What is Port 465?

SMTP over SSL/TLS (implicit TLS). Provides encrypted email submission from clients to mail servers. Reintroduced by RFC 8314 as the recommended port for message submission with implicit TLS.

TCP Email Commonly Used

Security Considerations

Port 465 (SMTPS) is classified as low risk. This service uses encryption or has a minimal attack surface, making it relatively safe to expose.

Recommendation: Standard security practices apply. Keep software updated and monitor access.