AUTHPROBLEM.comEmail Authentication Analysis

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This page lists the main public pages available on the site.

Home	Run SPF, DKIM, and DMARC checks together and inspect common email authentication issues.
Contact	Send a question about the site or share details about an email authentication issue you are investigating.
About	Learn how SPF, DKIM, and DMARC work together and how email authentication commonly goes wrong.
Reference	Review SPF syntax and macros, DKIM selectors and tags, and DMARC policy and reporting guidance in one page.
Sitemap	Browse the main public pages available on AUTHPROBLEM.com.
Disclaimer	Read the site disclaimer, validation guidance, and provider-processing notes.