Error: mailgun emails not delivered

What's Causing This Error?

This error will occur when Mailgun delivers your emails using a low-rated IP address. Low-rated IP addresses may cause the ISP to send the email to spam or reject it.

Solution - Here's How To Resolve It

First, check the sender score of your IP address on Mailgun using a tool like Sender Score. If the score is less than 70% (this is the case for most Mailgun accounts on the free plan), send a support ticket to Mailgun with a request to assign your account a sender IP with a higher reputation.