Really informative tool for tuning SPF, DKIM, DMARC etc. settings to make sure your email authentication works and mail doesn't get to the spam folder: Newsletters spam test by mail-tester.com
You can make some tests for free, or buy a license (there are many options).
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.