http://serverlist101.com/minecraft-servers/12/ Believe me, in a long run it will be worth it even if at first it requires you to setup all these MTA servers. I can setup a new sending server in less than 30 minutes and have it completely integrated with my Email Management Software Mumara and it costs me about $2 (two) per month. It will require about 30 minutes of work to setup a new server but we still got most of the clicks. It is a monitoring tool that comes in real handy if you have your bulk email system setup like this. You cant imagine their joy when they hear my logic behind bulk email server or in this case bulk email systems. Like I said before when you start building your bulk email server you must plan for the worst case…