Question 1

How long does DMARC migration take?

Accepted Answer

A typical DMARC migration from p=none to p=reject takes 2-3 months. The key is to move gradually: monitor with p=none, then quarantine with increasing percentages, then reject. Rushing can cause legitimate email to be blocked.

Question 2

Why can't I just set p=reject immediately?

Accepted Answer

Jumping straight to p=reject risks blocking legitimate email from third-party services (marketing tools, CRMs, etc.) that send on your behalf. The gradual approach lets you identify and fix authentication for all senders first.

Question 3

What happens during each DMARC phase?

Accepted Answer

Phase 1 (p=none): Monitor only — collect reports. Phase 2 (p=quarantine): Failing emails go to spam. Phase 3 (p=reject): Failing emails are blocked entirely. Each phase should run for 2-4 weeks while monitoring reports.

DMARC Migration Planner