On Wednesday, March 01, 2006 9:54 AM -0600, Stuart D. Gathman wrote:
<...>
The client in question hired me because his server was being used as
a high volume bounce spam relay (where the spammer sends
deliberately misaddressed mail from Windoze zombies all over the
world with an MFROM for the intended target). So verizon may have
his IP on some kind of blacklist. But why they think rejecting SRS
MFROMs helps is beyond me. The bounce spams had an <> MFROM.
If Verizon uses a rating system, an IP that is a spam bounce relay
combined with a return-path address that has unusual syntax might push
it over the threshold.
--
Seth Goodman
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