On Tue, Jun 25, 2013 at 05:01:59PM -0000, John Levine wrote:
> There is a somewhat popular convention that if a domain publishes an
> MX like this:
>
> whatever.example MX 0 .
>
> it means the domain does not receive mail. There was a draft about it
> in 2005 but it's never been formally standardized and the question has
> arisen how widely imlplemented it is.
>
> I don't see anything about it in the postfix docs. Does Postfix
> do anything special with such an MX? Or if not special, does it
> fail deliveries?
Postfix reluctantly supports this:
- Bounces mail addressed to such domains.
- Refuses mail from such domains when the administrator has chosen
to use "reject_unknown_sender_domain" in SMTP server restrictions.
--
Viktor.
