SMTP Bounced mail issue

[dan]

From our outbound SMTP server, we get many of these messsages to certain domain. Other domains do not cause this problem. Mail can usually be sent to these addresses from yahoo or gmail so we know the addresses are correct.

I don't know what is going on. Any suggestions would be welcome.

Dan
----------------------------
Reporting-MTA: dns;xx.xx.com
Received-From-MTA: dns;xx.xx.com
Arrival-Date: Thu, 15 Jun 2006 09:43:45 -0400

Final-Recipient: rfc822;xx@xx.com
Action: failed
Status: 5.7.1
Diagnostic-Code: smtp;501 5.7.1 This system is not configured to relay mail from <xx@xx.com> to <xx@xx.com> for 199.165.138.6

 

[dan]

Typically, some mail servers do a reverse DNS lookup on the sending server. If the DNS name does not match the advertised name, it will reject mail as spam. I assume you are using IIS as your mail server since you posted here.
You can use

http://www.checkdns.net/quickcheckdomainf.aspx

to see how your mail server advertises itself (assuming it has an MX record) and be sure you have a reverse DNS entry to match the name.
Dan

 

[monsterjta]

Dan, did you just answer your own post without realizing it??? I'm a little bit amused right now

Hope This Helps,

Good Luck!