Comment by rajeemcariazo

I like Mailgun so much because of its simplicity but last November 2017 the default postmaster account of one of our domain in Mailgun was hacked. (I don't know where it was hacked but i suspect it was on the Mailgun server because I kept the secret key in my server very well). We moved to Sendgrid because my account in Mailgun got a very bad reputation. One of the hacked smtp credentials was used to send spam.