I have been using https://www.mail-tester.com/ to check the scores of our newsletter emails.

I have worked on improving our score where we can, but there are aspects of the score that we cannot control. It would appear to be related to the way Zoho campaigns builds the emails.

For example there is a broken link:

[403 - Error : Forbidden] https://fonts.googleapis.com/css?family=Verdana:400,400i,700,700i

And also the emails are sent as HTML only. See the error message below.

-1.105 MIME_HTML_ONLY Message only has text/html MIME parts

You should also include a text version of your message (text/plain)

Can someone help me solve these two issues?

The complete report can be found here: https://www.mail-tester.com/test-5d4fwccn8