Multiple A records and reverse DNS

John Miller johnmill at
Thu Mar 17 14:09:24 UTC 2016

Which FQDN does your mail server use for its EHLO?  It should use the
same name that's listed in reverse DNS.


On Thu, Mar 17, 2016 at 9:53 AM, Thomas Schulz <schulz at> wrote:
> This is not a BIND question but I hope people here will know the answer.
> We are switching service providers and I understand that many email SPAM
> prevention systems insist on the reverse DNS matching the forward DNS.
> If I have two A records for our mail server and the reverse record matches
> one of them, will that be good enough. Or will the fact that the other A
> record does not match cause trouble.
> Tom Schulz
> Applied Dynamics Intl.
> schulz at
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John Miller
Systems Engineer
Brandeis University
johnmill at
(781) 736-4619

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