Le 02/09/2014 18:51, Viktor Dukhovni a écrit :
> 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).
>
It seems quite natural to not accept email if we are not able to send
back an error notification in case of problem...
