Problem solve Get help with specific problems with your technologies, process and projects.

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.

Do you have comments on this Ask the Expert Q&A? Let us know.
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

  • Dig Deeper on Exchange Server setup and troubleshooting

    Have a question for an expert?

    Please add a title for your question

    Get answers from a TechTarget expert on whatever's puzzling you.

    You will be able to add details on the next page.

    Start the conversation

    Send me notifications when other members comment.

    Please create a username to comment.