How do I check that my DMARC record is correct?

Query TXT at _dmarc or use our free ActiveDMARC DMARC Checker : you will see tags, effective p / pct , and common problems. After DNS changes, wait from a few minutes up to 48h for propagation and verify again.

What happens if DMARC is not enabled?

Without a DMARC record, receivers lack a consistent policy for mail that does not confirm your From. Brand spoofing is easier, and you get no RUA for source inventory. Missing DMARC also makes it harder to meet bulk-sender expectations (Google/Yahoo) that require a published record.

How do I manage a DMARC transition in practice?

Use ActiveDMARC checkers to validate DNS, keep the rua tag, read aggregates under real sending, and tighten p= / pct only when the report is clean. Do not rely on a fixed calendar. Rely on report data and mail volume.

How does DMARC differ from SPF and DKIM?

SPF authorizes IPs against the envelope, DKIM signs the message, and DMARC enforces policy against From when neither check confirms the From domain. SPF and DKIM supply signals; DMARC decides disposition ( none / quarantine / reject ) and reporting.

Is DMARC required for Gmail and Microsoft 365?

For bulk senders, Google and Yahoo require SPF, DKIM, and a DMARC record (often p=none is enough to start). Microsoft 365 enforces DMARC under its own receiver rules. p=reject is not an automatic “legal requirement”: it is target enforcement after an audit.

What are the pct and sp tags for?

The pct tag applies policy p= to only part of traffic that fails From confirmation (useful during rollout). The sp tag sets subdomain policy independently of the main domain; for example p=reject; sp=none protects the apex while you audit subdomains.

How long should I watch p=none before reject?

For a new domain it can be short (after tests). For live production we recommend about two weeks of real sending in RUA, or longer when mail is sparse or sources are many. The criterion is coverage and no unexplained fails in the reports, not a calendar date.

DMARC from p=none to p=reject: Complete implementation guide

How to move DMARC from p=none to p=reject: SPF/DKIM From alignment, RUA reports, pct and sp tags, a realistic timeline, and avoiding false positives.