Mailgun + DigitalOcean
Mailgun offers pretty easy integration and 10'000 free emails a month. Plus the customer service is amazing. DigitalOcean can host a pretty cheap and comfortable cloud »
Hosting multiple instances of Meteor on DigitalOcean
UPDATE: As Galaxy is out and Meteor Up is not being actively developed I'd suggest you save your headaches and just go with Galaxy. As per »