Re: [Asrg] Massive bounce rates on spammer lists

[jm@jmason.org (Justin Mason)]

David F. Skoll said:

> Thanks for that.  I have a refinement to the proposal that makes it
> unlikely to hurt valid mailing lists: You only report the offending IP
> if your DSN itself bounces (alternatively, you punish a bounced DSN
> with a very high weight.)  Of course, you need a way to correlate the
> DSN to the original IP, but that seems pretty easy---you control the DSN
> contents, so you put a special (encrypted, maybe) header in it indicating
> the original source of the e-mail.

Actually, I'm not sure that's a good idea; it'll provide an impetus for
spammers to joe-job, impersonating known-valid From addrs (typically
by picking one at random from the same list of addresses).

--j.
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