I'm hoping that someone can provide a best method for changing the main shared IP (which is also the Exim mail server IP) of one of my servers. The data center I purchased the server from inherited to me a dirty IP mixed into a /24 net of abusers and spammers, so my customers are getting blocked despite the fact that my IP is squeaky clean. I've already gone through every unblocking / delisting procedure imaginable (including asking the data center noc to do something about it) but after 3 months of fighting this issue I can see clearly they aren't going to clean up the garbage users from the network. SO... Can anyone tell me the best method to assign a new IP as the server's main IP / main shared IP, and if possible without any downtime for my users? Fingers crossed... and thank you!