465
SMTPS
Low RiskTCP — Email
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.