I figured out how DMARC works, and it almost broke me | Simon Andrews
simonandrews.ca/articles/how-to-set-up-spf-dkim-dmarcHow to use SPF, DKIM, and DMARC to improve your domain's email security and limit spoofing - but written for humans.
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How to use SPF, DKIM, and DMARC to improve your domain's email security and limit spoofing - but written for humans.