Port 995 — POP3S

Port 995 — TCP

POP3 email retrieval protected by implicit TLS.

What is port 995 used for?

Encrypted POP3 email retrieval.

Transport protocol

TCP

Security precautions

Prefer POP3S over unencrypted POP3 on port 110 when POP access is still required.

Should we open this port in the firewall?

Allow this port only when a required service uses it. Apply least privilege: restrict authorized sources, destinations and interfaces, and log connections where appropriate.

How do I check this port?

Test-NetConnection SERVER -Port 995

On Linux, nc -vz SERVER 995 checks TCP connectivity only. A successful TCP connection does not validate the application, authentication or TLS configuration.

Port-to-service mappings are common conventions. Applications can use a different configured port; confirm the actual service and transport.