Check if port 465 is open
On the server, see what is listening:
sudo ss -tulpn | grep ':465 'From another machine, test reachability:
nc -zv your-server.example.com 465Port 465 (TCP) — SMTPS
SMTP submission over implicit TLS.
🔒 Runs locally — your input never leaves this browser tab
- Port
465- Protocol
- TCP
- Service
- SMTPS
- Internet exposure risk
- Low
Used by mail clients to send mail.