Re: [exim] Rate limiting on Sender Verify

Marc Perkel wrote:
>
>
> Chris Edwards wrote:
> > Rate-limiting callouts based on the sender domain only helps in the
> > special case where a spammer is repeatedly using one domain for multiple
> > attempts on your server.
> >
> > But surely most of the spam you receive has sender addresses in different
> > faked domains (not just different localparts at a single "domain.com").
> >
> > So you'll still be emit a lot of collateral traffic.
> >
> >
>
> Actually from what I've seen spammers will find some misconfigured
> domain that they like for some reason and use it for the fake addresses.
> Generally a domain that has catchall accounts.

It is possible if the admin of that catchall domain decided to block all <>
senders to the catchall address, it wouldn't be so bad.

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