Q

Mail from outside domain does not make it to my domain

SearchExchange.com expert David Sengupta helps an admin troubleshoot problems with mail from outside domains not making it to the company's domain.

When I send mail from an outside domain, it's not coming to my company's domain. When I do send mail from my domain to another domain, it works, but not in Yahoo. I have tested SMTP and DNS configuration by using smtpdiag.exe file and it is all working OK.
I recommend you use a machine outside your company to check your public DNS record. Specifically, have a look at the MX records, and test telnetting to port 25 for each of these records (use the IP addresses associated with each hostname). I suspect that at least one of your MX records is not correct or is missing, and therefore internet SMTP clients can't find your domain.


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Related information from the TechTarget Windows Network:

  • SearchExchange.com Tip: Common Exchange mail delivery issues
  • SearchExchange.com Reference Center: DNS
  • SearchWin2000.com DNS Primer: Understanding AD-integrated zone configuration


  • This was first published in September 2005

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