My Review: jpgmail.com These guys have a front-end platform with PMTA running the back end. From what I have seen of their system, it's fairly straightforward and doesn't have all the bells and whistles. Not much automation with mailer networks or registrars through APIs. However, for a mailer starting out in GI, you can load up servers, tunnel the IPs and make some money. They also own their own ISP: acceleratebiz.com