On Tue, Sep 02, 2014 at 06:44:19PM +0200, Robert Schetterer wrote:
> so this stays as valid mx record ?
>
> $ dig -t mx airbus.com
> airbus.com. IN MX 0 vip-smtp.airbus.gmessaging.net.
Yes, of course.
> and this is what nullmx is done rightly?
>
> $ dig -t mx stoerseite.de
> stoerseite.de. IN MX 0 .
Yes, provided stoerseite.de neither receives nor sends (as envelope
sender) any email. The "nor sends" part is a side-effect of many
domains (including mine) refusing email from envelope senders in
unreachable domains (reject_unknown_sender_domain).
--
Viktor.
