postfix sending but not recieving
I'm having a issues with my new install of postfix. Its running on a Centos 5x server with webmin installed. I can email out of the server no problem but somehow can not receive email. I can telnet into port 110 fine but I cant telnet into the 25 port. The server is behind a router using NAT and I checked the routers firewall just to make sure its letting in port 25 traffic and it is. Could it be that my mx record is not right? When I do an mx records search I get no result but here is my mx record settings
Does that seem right? Would I have to make a CNAME as well for the mail.mydomain.com? Also is there another place I can check to see if port 25 is open on the server?
UPdate: I can telnet into port 25 on the box itself but not from the outside world.