On Tue, Apr 26, 2011 at 10:49:03AM -0500, Dan Lists wrote:
> I am seeing the following in my logs:
>
> Apr 26 10:18:43 mailhost postfix/smtpd[46627]: connect from
> unknown[98.118.152.26]
>
> However, the IP does resolve:
>
> mailhost # host 98.118.152.26
> 26.152.118.98.in-addr.arpa domain name pointer onlinecourseevaluations.com.
>
> mailhost # host onlinecourseevaluations.com
> onlinecourseevaluations.com has address 98.118.152.28
26 != 28
> Why isn't postfix using the hostname returned by the reverse DNS
> lookup? Is it because the forward and reverse DNS do not match? I
Yes.
> thought I've seen cases where forward and reverse did not match but
> it still showed a hostname for the client.
No.
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