On Mon, 07 Nov 2011 01:09:19 CST, Robert Bonomi said: > You're missing some 'obvious' considerations. Consider a spam complaint > sent with 'full headers' included. The rDNS _at_the_time_of_the_crime_ > is present in the complaint.
And if the rDNS isn't provided, any sane MTA will have included the IP address and timestamp involved, which shouldn't take you all *that* much longer to track down to one of your users.
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