SMTP over SSL. Encrypted email submission. Port 587 with STARTTLS is now preferred.
Test it now with our Port Scanner
| Port | 465 |
|---|---|
| Service | SMTPS |
| Protocol | TCP |
| Encrypted | Yes (TLS/SSL) |
| Common Use | SMTP over SSL |
Online: Use our Port Scanner — enter your IP and port 465.
Command line:
nc -zv your-server-ip 465 (Mac/Linux)
Test-NetConnection -ComputerName your-server-ip -Port 465 (PowerShell)
Check locally:
ss -tlnp | grep :465 (Linux) netstat -an | findstr :465 (Windows)