Peter H via Postfix-users:
> Hello,
>
> When my mailserver talks to other MTA, it certainly will issue a HELO
> command.
>
> Saying the hostname after HELO is: mail.host.com, which points to an IP.
>
> But this IP's PTR doesn't point back to the hostname above.
A Postfix SMTP server will set the client name to "unknown", and
other software may use this mismatch in a reputation score.
> That's saying, the IP does have a PTR like web.host.com, and
> web.host.com points to that IP correctly.
Is there any software that cares whether the web.example hostname
matches the PTR record?
I use distinct IP addresses for mail and web, so I haven't run into
this problem.
Wietse
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