https://dmarctools.org/newsStandards updates and email sender requirements.enSun, 25 Oct 2026 00:00:00 GMThttps://dmarctools.org/news/rspamd-4-2-1-security-authentication-fixeshttps://dmarctools.org/news/rspamd-4-2-1-security-authentication-fixesRspamd 4.2.3 fixes trust in ARC chains with invalid seals, following earlier October security updates. Gateway operators should review trust and scoring rules.Sun, 04 Oct 2026 00:00:00 GMThttps://dmarctools.org/news/hmailserver-6-3-6-authentication-delivery-securityhttps://dmarctools.org/news/hmailserver-6-3-6-authentication-delivery-securityProgressive Robot’s hMailServer 6.3.7 fixes signing of forged mail with hosted domains’ DKIM keys, following 6.3.6’s authentication and delivery fixes.Sun, 18 Oct 2026 00:00:00 GMThttps://dmarctools.org/news/cisco-secure-email-gateway-exploited-attachment-flawhttps://dmarctools.org/news/cisco-secure-email-gateway-exploited-attachment-flawCisco confirms exploitation of CVE-2026-76519. Gateway operators should verify scanner updates and check for compromise across their clusters.Sun, 25 Oct 2026 00:00:00 GMThttps://dmarctools.org/news/pingone-dkim-email-trust-october-deadlinehttps://dmarctools.org/news/pingone-dkim-email-trust-october-deadlinePingOne announces DKIM requirements for email trust and changes to notification customization. Administrators should prepare DNS before the stated date.Sun, 18 Oct 2026 00:00:00 GMThttps://dmarctools.org/news/stalwart-0-16-25-dkim-key-rotation-fixeshttps://dmarctools.org/news/stalwart-0-16-25-dkim-key-rotation-fixesStalwart fixes rotation bugs that could leave mail unsigned or activate unpublished DKIM keys. Operators should check DNS management and delivered signatures.Sun, 11 Oct 2026 00:00:00 GMThttps://dmarctools.org/news/icloud-header-spoofing-disclosurehttps://dmarctools.org/news/icloud-header-spoofing-disclosureSEC Consult discloses iCloud header-parsing flaws that passed SPF, DKIM and DMARC. Its timeline confirms remediation in December 2025.Sun, 18 Oct 2026 00:00:00 GMThttps://dmarctools.org/news/stalwart-september-dmarc-reporting-fixeshttps://dmarctools.org/news/stalwart-september-dmarc-reporting-fixesStalwart’s September releases correct DMARC result labels and aggregate report XML. Operators should check logs and newly generated reports after upgrading.Sun, 04 Oct 2026 00:00:00 GMThttps://dmarctools.org/news/uk-census-retired-mail-check-reportinghttps://dmarctools.org/news/uk-census-retired-mail-check-reportingA September study finds old Mail Check destinations in public-sector DMARC and TLS reporting records, prompting a review of replacement monitoring.Mon, 21 Sep 2026 00:00:00 GMThttps://dmarctools.org/news/ietf-mail-transition-dmarc-rewritinghttps://dmarctools.org/news/ietf-mail-transition-dmarc-rewritingThe IETF’s September mail transition rewrites addresses according to SPF and DMARC policies. Teams using its lists should check headers and replies.Sun, 27 Sep 2026 00:00:00 GMThttps://dmarctools.org/news/dmarc-new-standards-2026https://dmarctools.org/news/dmarc-new-standards-2026Three new RFCs replace the original DMARC specification, separating the core protocol from reporting.Mon, 14 Sep 2026 00:00:00 GMThttps://dmarctools.org/news/outlook-high-volume-sender-requirementshttps://dmarctools.org/news/outlook-high-volume-sender-requirementsMicrosoft’s May 2025 change makes SPF, DKIM, and DMARC an operational requirement for affected senders.Mon, 14 Sep 2026 00:00:00 GMThttps://dmarctools.org/news/gmail-bulk-sender-requirementshttps://dmarctools.org/news/gmail-bulk-sender-requirementsA reference brief on the requirements introduced in 2024 for senders reaching personal Gmail accounts.Mon, 14 Sep 2026 00:00:00 GMT