Re: [Exim] how to reject email that doesnt come from a valid…

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Autor: Nigel Metheringham
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A: exim-users
Assumpte: Re: [Exim] how to reject email that doesnt come from a valid MX ?
On Mon, 2003-03-17 at 19:49, Tom Kistner wrote:
> Hanasaki JiJi wrote:
>
> > Any way to block all email comeing from an IP that isnt in the MX list
> > of the sending doman?
>
> Not an answer to your question, but anyway:
>
> DON'T !!!!


To follow up to this, *most* large email installations use different
machines/ips for mail receipt and for outward sending. If you insist
that connections have to come from the MX for the originating domain
then you will block out nearly all large ISPs. Whats more you will
block out people who have their own domain but send out mail via their
the ISPs smarthosts - ie that would apply to me at home.

    Nigel.
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[ Nigel Metheringham           Nigel.Metheringham@??? ]
[ - Comments in this message are my own and not ITO opinion/policy - ]