The client could not reach the server at all.
WHAT IT MEANS
No response on the port it tried. This is a network-level problem rather than a credentials problem.
CHECK THESE
- The port. Incoming 993 with SSL. Outgoing 465 with SSL, or 587 with STARTTLS. Many networks block port 25 entirely, and some office networks block 465.
- The hostname. mail.yourdomain.com only resolves once the domain points to us. Before then, use the server hostname from your welcome email.
- Your network. Test on mobile data with wifi off. If it works there, your network or router is blocking the port.
- A firewall block. Repeated failed logins block your address, and the symptom is a timeout rather than a rejection.
- Antivirus or security software intercepting mail connections. Temporarily disable its mail scanning to test.
IF IT WORKS ON MOBILE DATA BUT NOT AT THE OFFICE
Either your address is blocked at our firewall, or your office network blocks the port. Try the alternative port first; if that works, it was the network.
