On 2017-03-31 15:01:17 (+0200), Ralf Hildebrandt <r...@sys4.de> wrote:
> * Mario Theodoridis <mario.theodori...@regify.com>:
> > i'm having a curious issue with our postfix instance.
> > 
> > It seems it is sending emails to a domain's A record when no MX is found.
> > 
> > Is that standard?
> 
> Yes.
> 
> > If so, can i disable this somewhere?
> 
> No.

If you own a domain that should not be receiving email, you can prevent
MTAs trying to send mail to it by explicitly specifying a null MX in the
DNS:

    bikinibottom.com. IN MX 0 .

Philip

-- 
Philip Paeps
Senior Reality Engineer
Ministry of Information

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