Re: [Exim] exim3 callbacks vs "promiscuous" smarthost

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Author: Vineet Kumar
Date:  
To: exim-users
Subject: Re: [Exim] exim3 callbacks vs "promiscuous" smarthost
* Vineet Kumar (exim-users@???) [030505 21:44]:
> Hello,
>
> I noticed on one of my secondary MXes a lot of spam hanging around in
> the queue. All of my hosts use smtp callbacks for sender verification,
> but this particular host is configured to send all of its mail through
> the ISP's smarthost.
>
> The smarthost doesn't do any sort of callouts for recipient verification
> when accepting mail to relay, so the effect is that all of my MX's
> callbacks appear "successful", so it accepts the mail. Of course, then
> it never makes it to my primary host, since its callbacks correctly
> reject the spam.
>
> Does anyone know if there's a way to specify that callbacks should be
> sent directly (via the lookuphost router) while all outgoing "real"
> mail should be sent through the smarthost?


Okay, I feel dumb; I just found the answer in the spec (of course!). I
should have just kept reading a few more minutes! It looks like it will
work to use verify_only on the first router (the direct delivery) and
then the smarthost router listed second will handle the actual
deliveries. Untested, but this is what my reading of verify_only seems
to indicate.

If anyone can tell me that my reading is incorrect, please do. Thanks
anyway!

good times,
Vineet
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