Or, to be more precise, it sure looks like they do. I wrote on another post on a publicly available spam tool, and I mentioned that I came across a page that allowed people to verify whether or not an email address is actually live. The question naturally arises: do spammers clean up their email contact lists based upon whether or not the address is legitimate? Spammers would have an incentive to do this… Do we actually observe spammers changing their sending patterns? I believe that we have evidence that they do.
http://www.circleid.com/posts/7101914_spammers_tactics_recipient_verification/
Do Spammers Change Their Tactics Based on Recipient Verification? Yes, They Do by Terry Zink
Or, to be more precise, it sure looks like they do. I wrote on another post on a publicly available spam tool, and I mentioned that I came across a page that allowed people to verify whether or not an email address is actually live. The question naturally arises: do spammers clean up their email contact lists based upon whether or not the address is legitimate? Spammers would have an incentive to do this… Do we actually observe spammers changing their sending patterns? I believe that we have evidence that they do.