Tired on a Friday evening I was dangerously close to falling for this phishing attempt.
I am a Mailgun customer, but while this is a working address it's not the one I use for Mailgun. I also recently replaced my card, which played into this. But why use my own address as sender account?
1/2
This example demonstrates a serious weakness in email clients, where it's possible to display a link that looks legit and have it link to a completely different website in the background.
Don't click links in emails!
(Via direct Mailgun visit I could verify I had no outstanding payments.)
2/2