I am vtdataguy. I live in Vermont. As the name says I deal with lots of data predominately mailing lists - email, postal, etc. As you can imagine trying to keep up with all of the updates to any mailing list (mine is over 3 million by the way of mostly business) is a tough problem for anyone, never mind a small three person operation. I do not sell these lists just use them in conjunction with my other businesses. I'd be interested in chatting with anyone who tries to maintain any kind of mailing lists especially email. I've been trying to find good cheap or free bulk email verifiers. I have seen prior posts on here, but other than trying to use these single email (1 email at a time) services, I have spent a lot of money but not getting really good results. What are others doing other than just sending out your non-spam email and tracking any and all of the rejects?