standard

RFC 9989

The IETF Standards Track specification of DMARC, which supersedes the earlier Informational DMARC document, drops the pct tag in favour of a testing tag, and defines organizational domain discovery by DNS Tree Walk.

Current clusters

build1 publisher

Deleting pct=25 from a DMARC record quadruples the mail your policy touches

RFC 9989 removed the pct tag on 19 May 2026, and a record still carrying pct=25 describes a staged rollout that conforming receivers no longer honour. The replacement, t=y, gives one testing step and no percentages.

Publishers:dev.to

Reality

Evidence64
Adoption: Insufficient
Hype gap+18
Incentives22
Confidence58