DMARC pct — Percentage
What share of failing mail the policy applies to.
- Required
- no
- Default
- 100
- Valid values
0-100
What it does
pct=25 with p=quarantine means roughly a quarter of failing mail is quarantined and the rest is treated as p=none. It exists to let you ramp a policy gradually. Note that the DMARCbis revision removes pct entirely, so treat it as a temporary rollout aid rather than a permanent setting, and get to pct=100 as soon as reports look clean.
Example
v=DMARC1; p=quarantine; pct=25; rua=mailto:dmarc@example.com