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sealedmail
SealedMail @sealedmail@infosec.exchange · Jul 15, 2026
Tired of DMARC checker tools that demand dashboard logins or charge per domain? We've compared 4 alternatives to help you pick the right one for your needs. Check it out: https://www.sealedmail.co.uk/resources/dmarc-checker-4-alternatives/ #DMARC
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cyberseckyle
Kyle Reddoch (CybersecKyle) @cyberseckyle@infosec.exchange · Jul 09, 2026
New by me: CybersecKyle Security How-To Series: Power User and Small Team, Part 2 - Email Security with SPF, DKIM, and DMARC https://www.kylereddoch.me/blog/cyberseckyle-security-how-to-series-power-user-and-small-team-part-2-email-security-with-spf-dkim-and-dmarc/ #Cybersecurity #InfoSec #EmailSecurity #DMARC #CybersecKyleHowTo
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tychotithonus
Royce Williams @tychotithonus@infosec.exchange · Jun 15, 2026
Hey, I missed that the updated DMARC RFCs are out! Notable: p=reject discouraged for general user-side mailboxes, in favor of p=quarantine (and reject will effectively be treated like quarantine)Removed: pct -- replaced by t (testing mode)New: np -- policy for non-existent domainsstill v=DMARC1and more Good commentary: https://www.dmarctrust.com/blog/dmarcbis-rfc-9989-9990-9991 Links to the full RFCs: https://datatracker.ietf.org/doc/html/rfc9989 https://datatracker.ietf.org/doc/html/rfc9990 https://datatracker.ietf.org/doc/html/rfc9991 Of course, it will take some time for support to ripple outward. #DMARC
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