I have default mail settings for my server but even that for me seems that everything is alright, I can't receive mail for the user from Usermin. I login to Usermin, I click compose new message send it. Then I successfully receive it, to where I've sent it. BUT when I reply my server/configuration is not receiving it? (and I don't get any messages in return with error - just sent in the void)
I suspect firewall? What TCP/UDP IN ports should be opened to receive mail? I don't have standard firewall settings?
Maybe something else?
Oh, by the way, DNS is set as:
IN MX 5 mail.myserver.com.
mail 14400 IN A 220.127.116.11
imap 14400 IN CNAME mail.myserver.com.
smtp 14400 IN CNAME mail.myserver.com.
Is it ok for DNS?