Re: [Asrg] Re: SPF abused by spammers

[Seth Breidbart <sethb at panix.com>]

"Tim Bedding" <tim.bedding at polyhedra.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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