Re: [Exim] offers123.net & possible DOS.

ph10@??? said:
> Exim is only going to do this if you have configured callbacks. In
> Exim 3, use sender_verify_callback_timeout to reduce the timeouts.

{For how long,} does Exim cache the result of such a callback?

If I do this on a box from which 3 people are subscribed to a list like the
linux-kernel mailing list, how many connections per day will it be making
to verify owner-linux-kernel@...?

--
dwmw2