AUTHPROBLEM.comEmail Authentication Analysis

Use this page to check SPF, DKIM, and DMARC together for one domain. SPF helps publish which systems are allowed to send mail for a domain, DKIM publishes a selector-based public key so message signatures can be validated, and DMARC tells receiving servers how to apply policy and reporting when SPF or DKIM alignment fails.

Enter the domain name once, optionally add a DKIM selector, and review the results on one page. If you leave the selector blank, the site will still run SPF and DMARC checks.