Greetings community!
I've recently tried installing a mail server on my Azure VM (Windows Server 2012).
The server is already running IIS and MSSQL Express with no problems.
The mailserver naturally requires a few endpoints to be open for imap, pop3, and smtp.
I've opened the endpoints, and opened the ports in the firewall, and it seems to work - except of Port 25.
I can make the mailserver send outbound mails if i set it to port 2525 instead, but the mailserver can't be reached (receive incoming mails from the internet). Error message in mails say: Connection refused.
The endpoint is open - and the firewall rules are also open for port 25. Yet the port remains blocked.
I don't know how to move on from here - has anyone experienced the same problem, or does someone know how to fix it?
Thank you.
// Thomas