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Re: [Asrg] Re: SPF abused by spammers

2004-09-10 16:57:51
"Tim Bedding" <tim(_dot_)bedding(_at_)polyhedra(_dot_)com> wrote:

1. Greylisting:  Email from a new domain that passes SPF is greylisted
  for 30 minutes.

Is this the same as the following?

1. Email from a domain of unknown-reputation is greylisted

Yes.

If so, then a spammer would wait until his domain goes green
and he can then send email in the interval before the
domain is black-listed.

This defeats the grey list.

The idea is that the spamtrap addresses will cause blacklisting before
the domain can green off the greylist.

Seth

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