spf-all-dmarc

Email authentication: SPF, DKIM, DMARC, BIMI and MTA-STS

SPF Softfail Still Passes DMARC When Aligned True or False

Understand why SPF softfail still allows DMARC to pass under alignment. Use MailTester to verify email validity and fix deliverability issues before.

Email authentication: SPF, DKIM, DMARC, BIMI and MTA-STS

SPF -all with DMARC p=reject: Redundant or Needed?

Verify your email setup logic. Learn whether SPF -all with DMARC p=reject is redundant, and how MailTester’s real-time API catches flaws before they hurt.