On Tue, 3 Dec 2002, Colin Campbell wrote:

> Hi,
>
> On Mon, 02 Dec 2002 16:53:24 +0100
> Matthias Andree <madt.e-technik.uni-dortmund.de> wrote:
>
> > "nearest" in Wietse's logs might mean this, but I didn't check; it makes
> > some sense because backup MX often enough do not know what users are
> > acceptable, but blindly accept the whole domain -- and bounce later.
>
> There's something that is bugging me about these checks. What happens when the
> MX returns 127.0.0.1? Will postfix, sending to "itself" accept all mail? I ask
> because there are a (growing?) number of domains from which we receive "mail"
> where the MX for that domain returns 127.0.0.1.
>

It would be better to reject such mail because of the invalid MX records
rather than the failure of the probe. This has been discussed before, I
think someone suggested an address match list for filtering MX records
when deciding whether a sender domain is valid. Perhaps this could
finally be implemented to make the probes more meaningful.

-- 
	Viktor.

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