I setup an e-mail server(smarter mail) in my vps. Everything works fine except the inbound SMTP server. I can send email but cannot receive. All the required ports and programs are allowed on firewall.
Hosting company told me that port 26 and 2525 is dedicated for SMTP communication. I set 26 as default port.
telnet mail.mydomain.com 26
command works successfully from outside. So I dont understand what the problem is. Why other mail servers cannot access? Hope someone can help.