Subject pretty much says all. I'm talking server and some client side mailing. As most know, it's really tough to get your ip OFF an email header - especially when sending via SMTP. Now, I don't use my ISP mail servers really at all. However, I'd like to carry out some of my "bulk sending" email from my home connection. I've read where a big ISP like att will block a port, but haven't been able to find any documented cases of people getting cut off without warning from the Interwebs Also, it *seems* the cases of ports getting blocked are dummies sending loads of mail over their own isp's outgoing or compromised machines. Thanks for any advice here.