A while back I enabled SMTP on my IIS server with the intention of using it for internal email notifications. It seems that somehow hackers were able to use it for sending out thousands of spam messages.
We've corrected the issue by adding some authentication to the server, but we're no longer trusted by many email clients. I'm guessing they must just assume we're still sending out spam by our IP?
Will our "stigma" ever go away so that we may send emails that don't go straight to the spam box? IP addresses are recycled so I don't imagine we can just be blocked forever.