In a scenario where mailgun sends an email to a customer that includes a PayNow button, the a href link gets scrambled. I am using my full domain https://example.com/payment/orderReview.html?orderNumber=240 however gmail changes this link in the email to http://email.mail.example.com/c/eJxtjjkOwyAUBU-DS_....superLongString
The email.mail is a property in my DNS file I had to make it setup the mailgun server.
Why is it doing this? How do I prevent this? If I can't, can I get my server to register that link and redirect it to my intended target?
I have my certificate on my server through LetsEncrypt if that means anything to the situation. https works fine with normal http traffic blocked.
Mailgun, through link tracking, is actually the one causing this issue. I have not read any documentation on link tracking or how to set it up properly after walking through the default setup, but disabling this resolves this issue.