Multiple A records and reverse DNS

Reindl Harald h.reindl at
Thu Mar 17 13:57:00 UTC 2016

Am 17.03.2016 um 14:53 schrieb Thomas Schulz:
> 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

when you have two A-recods then you have two IP's
each of them should have a PTR with *only* the name of the A-record
and in a good setup "smtp_helo_name" matchs too

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