Over the course of my mailing experience I've been in possession of a few solid domains that never get touched by the DBL At the same time I've had a whole bunch of them get hit by the end of a drop. I thought it was because the good domain was aged and maybe it being a .com helped. The ones that got flagged were newly registered and .us (if that matters) Im telling you, I mailed millions off this one domain and SH couldn't touch it. Only recently did it get listed because i got greedy and mailed to a list i shouldn't have. Old and probably under SHs control. Anyways, I tried replacing it by buying some aged domains off a forum. And I have not been blessed with a similar domain experience. this new domain i got that was aged got DBL'd in seconds. So I'm guessing the age didn't account for it. And it probably is not the data. I was mailing mostly my deliverables and O/C I also dont think its the content. That one good domain was used for all sorts of offers like dating, refinance, etc etc Maybe its just luck?