Rob Hoo via Postfix-users:
> hello
>
> I know that a sender host should have correct dns records for either A
> or PTR.
>
> for HELO hostname, does it require the same settings (both A and PTR are
> set, and matching).
I recommend that you specify the name of the sending IP address.
Setting smtp_helo_name is typically needed when you need to set
smtp_bind_address.
Wietse
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