Unable to receive email on Exchange Server

54,665 pts.
Tags:
Email Troubleshooting
Exchange Server
MX record
I have setup Exchange server in my organization. I can send Receive mail on intranet. Can send mail to outside domains like yahoo, gmail etc. But unable receive mails from outside that is from internet. I have domain with godaddy and created a MX record pointing to my public ip of my exchange server. What must be causing the problem?
ASKED: September 26, 2008  3:11 PM
UPDATED: September 29, 2008  7:12 PM

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I think you have DNS set up wrong. Having an MX point to an IP isn’t RFC complaint so will cause delivery problems. Review your DNS setting making sure you have an A record (host) pointing to your external IP. Something like mail.mydomain.com and then have your MX record point to mail.mydomain.com

Let us know
dmw

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I agree with the MX record – it should point to an A record.

Other things to check: Are you sure that your server has port 25 publicly exposed via the mapped IP and protected by a firewall? You <b>DO</b> have a firewall right? Be sure that the server is also configured to relay e-mail from ONLY internal sources and does not permit relay from the outside world. Test that port 25 is open to the public by simply telnetting to port 25 on the public IP address of your mail server. This will quickly show you if the networking portion is working properly.

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