Port 465 — SMTPS (legacy)
Quick reference for TCP/UDP port 465, used by SMTPS (legacy). Includes what the service does, security guidance and related ports.
Port
465
Protocol
TCP
Service
SMTPS (legacy)
What is port 465?
SMTP over TLS (legacy implicit TLS port).
What port does SMTPS (legacy) use?
SMTPS (legacy) listens on port 465 by default.
Security guidance
Low risk — designed for public exposure
Port 465 (SMTPS (legacy)) is designed for public exposure. Standard hardening (TLS certs, current firmware, sensible rate limits) is enough — no special isolation needed.
Related ports
Frequently asked
What is port 465 used for?+
Port 465 is the standard TCP/UDP port for SMTPS (legacy). SMTP over TLS (legacy implicit TLS port).
What port does SMTPS (legacy) use?+
SMTPS (legacy) listens on port 465 by default.
PROTECT YOUR PRIVACY
Your IP Address Is Exposed Right Now
Every website you visit can see your real IP address and location. NordVPN encrypts your traffic and hides your identity with military-grade encryption. Stay anonymous online.
Get NordVPN — 73% Off30-day money-back guarantee