postfix-users October 2010 archive
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postfix-users: Re: Postfix as MX fallback

Re: Postfix as MX fallback

From: Wietse Venema <wietse_at_nospam>
Date: Mon Oct 04 2010 - 16:01:42 GMT
To: Postfix users <postfix-users@postfix.org>

Christoph Petersen:
> Hi Wietse,
>
> Thanks for the reply. Is there a way to query DNS if the specified MX is
> present so I do not have to maintain the list of allowed domains?

I send lots of spam, and I configure DNS such that the sender domain
of my spam resolves to your MX (*). Would you please receive millions
non-deliverable mail notifications for me?

Thanks for helping out.

        Wietse

(*) I'll be happy to provide a bogus primary MX address that never
    responds.