I have everyone.net email service but have upgrade to a dedicated server in the past year. I have a ton of bandwidth and space to use and have no problem paying to upgrade to run my own email service so I can put an advertisement on every outgoing email. I however would like to buy a script others have used and tested. Get some feedback for others before buying.

Does anyone have any experience with doing this or advice on what to look for in this type of script?

Thanks for any advice