Here are the top five free tools for spam score and deliverability:
GlockApps: https://glockapps.com/
GlockApps allows you to quickly check your email for spam issues. It will also provide analysis of your email deliverability.
IsNotSpam: http://www.isnotspam.com/
IsNotSpam checks email content against multiple spam filters and gives you a spam score along with flagging potential issues.
Mail-Tester: https://www.mail-tester.com/
With Mail-Tester, you send a test email to a unique email address they provide. Once you send the email, you’ll get a detailed report back with a spam score and recommendations on how to improve deliverability.
SendForensics: https://www.sendforensics.com/free-email-deliverability-test/
SendForensics has a free email deliverability test that assesses factors influencing your email’s deliverability.
SpamCheck by Postmark: https://spamcheck.postmarkapp.com/
SpamCheck evaluates email content and provides feedback on issues that could lead to spam classification.
