I'm setting up hMailServer on a new Azure Windows VM. I've successfully sent a mail from my email client, and it arrived in the hMailServer outbound queue, but from there it gets stuck. I ran
telnet mail.hmailserver.com 25
and it replies:
Connecting To mail.hmailserver.com...Could not open connection to the host, on port 25: Connect failed
I've made specific outbound rules opening port 25, both in the Windows Firewall, and in the Azure Network Security Group, even though both appear to be allowed by default even without a specific rule.
What else do I need to do?