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Port 465: SMTPS (Implicit SSL Mail Submission)

SMTPS Port 465 is used for secure email submission directly wrapped in TLS/SSL encryption.

Protocol
TCP
Category
Email Security
Common Services
Postfix, Exim

What is Port 465 and How Does It Work?

SMTPS Port 465 is used for secure email submission directly wrapped in TLS/SSL encryption.

Security Vulnerabilities & Attack Vectors on Port 465

Require strong authentication and DKIM/SPF verification on submission.

Auditing & Scanning Port 465 with Nmap

Run the following command to check if Port 465 is reachable and determine service fingerprints:

nmap -p 465 -sV --script ssl-cert

Frequently Asked Questions

How do I check if Port 465 is open?
Use cyber-tool.org diagnostic tools or run 'nc -zv 465' in your terminal to verify open socket connections.
Is it safe to leave Port 465 open to the internet?
Exposing Port 465 (SMTPS (Implicit SSL Mail Submission)) publicly introduces potential exposure. Protect it with IP whitelisting, firewalls, and encryption.