Client has just installed an Exchange Server 2003 SP2 running on Server2003 Ent. We can send mail locally and over the Internet but cannot receive Internet mail. When the Internet mail recipient replys, no NDR or error saying the message was not delivered; appears the message went through but is never received.
-On the web host, I created an A record "server.domain.com" pointing to the Exchange IP and an MX record pointing to "server.domain.com".
-Opened port 25 on the local firewall.
-Created a local MX record for server.domain.com.