When comparing Postmark vs Mailgun, the Slant community recommends Mailgun for most people. In the question“What are the best transactional email services?” Mailgun is ranked 1st while Postmark is ranked 2nd. The most important reason people chose Mailgun is: Mailgun is included and configured by default in Meteor.js. So for projects which are built using Meteor, it's very easy to integrate Mailgu