Using Mail-Tester.com to troubleshoot deliverability issues
If you’re seeing lower inbox placement or spam folder issues for your bulk or Broadcast emails, Mail-Tester.com is a helpful tool for diagnosing potential causes.
This free tool analyzes your message’s content, headers, and domain authentication setup (SPF, DKIM, and DMARC) to identify factors that might affect deliverability.
How to use Mail-Tester.com
Go to https://www.mail-tester.com/.
Copy the unique email address shown on the page.
Send your bulk or Broadcast email from Postmark to that address.
Return to Mail-Tester and click “Check your score.”
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Review the report for:
Content issues (e.g., spam-triggering phrases, broken links)
Authentication errors (missing or incorrect SPF, DKIM, or DMARC records)
Blacklist or reputation concerns
Why this helps
Mail-Tester provides a quick, practical way to understand why your emails may be landing in spam folders. It’s especially useful when testing Broadcast (bulk) messages or when adjusting templates and authentication settings.
By reviewing the report and resolving any issues it flags, you can improve your chances of consistent inbox delivery.
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