Re: repeated attempts delivering mail to 'unknown user@samedomain'

[lars brun nielsen <lbn@danmedia.dk>]

Thomas Hochstein wrote:

> > Feb  6 08:11:27 celery postfix/smtpd[11548]: reject: RCPT from shawidc-mo1.cg.shawcable.net[24.71.223.10]: 550 <MULRVNHSVJM@DOMAIN.XX>: User unknown; from=<> to=<MULRVNHSVJM@DOMAIN.XX>
> >    
>
> "<>", an empty Return-Path:/Envelope-Sender, so those are bounces /
> non-delivery-notifications.
>
>  
>
> > an explanation eludes me, [...]
> >    
>
> Somebody is spamming while using adresses from your domain as the
> faked sender of those spam-mails. That's quite old news for some
> years; SPF was invented to avoid that. If you're lucky, you'll get
> some hundred of those bounces and be done with; if your're unlucky,
> you'll get some hundred *thousand* of them, or even more.
>  
thanks - i see it now.

lars



--
expect neither good nor evil.
	- deal with it