Policy
DMARC can monitor only, quarantine suspicious mail or reject failing messages.
Tool
DMARC tester
Analyzes the _dmarc DNS record: policy, rua reports, pct, SPF/DKIM alignment and enforcement mode.
Mail and DNS
DMARC tester: domain policy, reporting and sender protection
The DataHouse DMARC tester checks the _dmarc DNS record, policy p, rua reporting, pct enforcement and SPF/DKIM alignment settings. It helps companies control legitimate senders and reduce spoofing.
Reports
rua reports help identify legitimate senders before moving from p=none to enforcement.
Alignment
DMARC links SPF and DKIM authentication with the visible sender domain.
When should DMARC be checked?
- Before mail migration or MX changes.
- After adding a newsletter, CRM, helpdesk or application sender.
- Before moving from p=none to quarantine or reject.
- When spoofing, sender reputation or deliverability problems appear.
- After SPF, DKIM, TXT or subdomain changes.
How to interpret DMARC
A high score means the domain publishes one valid DMARC record, defines a policy, uses reporting and does not weaken enforcement with a very low pct value.
FAQ: DMARC tester
Does the DMARC tester send a test email?
No. It checks the public _dmarc DNS record, analyzes DMARC tags and highlights risks. It does not send email or log into a mailbox.
Is p=none enough to protect a domain?
p=none is a useful monitoring start, but it does not enforce protection. After legitimate senders are identified, move toward quarantine or reject.