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How to set up SPF, DKIM, and DMARC for your sending domain

92 points · 31 comments · spy888

  1. adiabatichottub · · focus · HN ↗
    I recently tried bouncing mail during the header phase when DMARC didn't align, but it rejected more legit emails than SPAM. Most of the junk we've been getting passes DMARC and has an unsubscribe link.
    1. 2000UltraDeluxe · · focus · HN ↗
      DMARC is for authenticating the sender, not filtering spam.

      Spammers are quite proficient at using authentication, whereas legitimate users are stuck in the 2000s wondering why their forwards don't work anymore.

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