I want to maximize my marketing emails to get delivered, so I'll use three audit tools to try to get an idea of whats happening.
- http://spamcheck.postmarkapp.com/
- https://www.mail-tester.com/
- https://mxtoolbox.com/deliverability
See important results from each below:
http://spamcheck.postmarkapp.com/
2.3 EMPTY_MESSAGE Message appears to have no textual parts and no
Subject: text 1.0 MIME_NO_TEXT No (properly identified) text body parts
https://www.mail-tester.com/
HTML and text parts are different
Make sure your TEXT version looks similar as the text inserted in your HTML version
https://mxtoolbox.com/deliverability
Nothing particularly important.