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Exchange server reverse dns does not match smtp banner

  • midnightwolf
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28 Feb 2012 16:50 #71395 by midnightwolf
Hi:

I have a problem with sending emails to certain servers like hotmail, they get my emails as spam,
I've been looking around and I found that one reason maybe because my server is behind the firewall,
and the email messages are from a local IP rather that the public IP.
when using http://www.mxtoolbox.com I have got the following warning: "Reverse DNS does not match SMTP Banner"
I have configured the FQDN properly on my exchange 2003 server.

Thanks in advance

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28 Feb 2012 22:24 #71401 by cocospm
This is nothing to do with the firewall. Ask yourself:

Is your public IP static or dynamic?

What FQDN does the reverse DNS for this IP address resolve to? (Note: your rDNS record can only be setup by your broadband ISP.)

How does this compare to the FQDN configured in your Exchange server's Default SMTP Virtual Server?

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29 Feb 2012 10:12 #71408 by nealuk
Check out SPF to see if setting records can improve your emails credability. It just needs a little thought, and no cash :)

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