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postfix-users: Re: Postfix as MX fallback

Re: Postfix as MX fallback

From: Victor Duchovni <Victor.Duchovni_at_nospam>
Date: Mon Oct 04 2010 - 15:26:26 GMT
To: postfix-users@postfix.org

On Mon, Oct 04, 2010 at 04:52:04PM +0200, Christoph Petersen wrote:

> 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?
> >
> > See:
> >
> > http://www.postfix.org/STANDARD_CONFIGURATION_README.html#backup

This is answered in the reference, but it MUST be noted that not managing
the list of relay domains is a very bad idea. You won't be able to do
recipient validation, and won't know who's impacted by any future changes
in your configuration.

-- Viktor.