DMARC only applies to a fraction of mail (pct)

Check id: dmarc.pct_partial · fix effort: low

What it means

Your DMARC policy only applies to a sample of messages. The rest slip through as if the policy were off.

The technical detail

pct below 100 with an enforcing policy leaves a permanent gap. Sampling is a rollout tool, not a steady state.

How to fix it

  1. Raise pct stepwise to 100 (or remove the tag. 100 is the default).

Does your domain have this problem?

Run a free scan, takes about ten seconds.