EmailDelivery.com

I bought the deal a while ago and the Support was great from the beginning because the setup is quiet technical even though they have a documentation.
The interface looks a bit outdated but the functionality is there to do whatever you need in a newsletter tool if you know how to get it to work.
Even if you're not experienced on how to set it up the support was great, you just need to learn and give yourself time to understand how it works.
There's nothing like it on the market for what I know so I really recommend you to get it while you can.