tejas sarade:
> >
> > You mean: no MX records; otherwise this is correct.
>
> Yes, that is what I meant.
>
> And I think that Postfix parameter ignore_mx_lookup_error controls the
> behaviour when there is no response for MX lookup at all.
Indeed. No response is an error.
> I guess that 'no MX' and 'no response for MX lookup' are handled differently.
Indeed. Postfix MUST distinguish between failed query (no response),
and negative response (MX record does not exist).
It is the same distinction as "cannot connect to SMTP server" and
"SMTP server replies with 'user unknown'".
Wietse
