Introduction
Moving a DMARC policy from p=none to p=quarantine is one of the most important steps in reducing domain spoofing. In 2026, organizations are under increasing pressure to move beyond monitoring and apply policies that actively protect recipients.
What DMARC Quarantine Means
A DMARC quarantine policy tells receiving mail servers to treat messages that fail DMARC checks as suspicious. These messages may be placed in spam, quarantined, or handled according to the receiver’s filtering rules.
Policy example:
v=DMARC1; p=quarantine; rua=mailto:dmarc@example.com
Why Move from None to Quarantine
p=none provides visibility but does not stop unauthorized email. Moving to quarantine helps organizations:
- Reduce direct domain spoofing
- Protect customers and partners
- Improve brand trust
- Prepare for eventual
p=reject - Demonstrate stronger email security controls
Migration Steps
1. Monitor Reports
Start with p=none and review DMARC aggregate reports. Identify all legitimate senders and unauthorized sources.
2. Fix SPF and DKIM Alignment
Before enforcing quarantine, ensure legitimate senders pass SPF or DKIM alignment.
3. Validate Third-Party Senders
Review CRMs, marketing platforms, support systems, billing tools, and transactional email providers.
4. Apply Quarantine Gradually
If needed, use percentage-based rollout to reduce risk:
pct=25
pct=50
pct=100
5. Monitor Deliverability
Watch for legitimate messages being quarantined and adjust sender configuration as needed.
Conclusion
Moving from none to quarantine is a practical step toward DMARC enforcement. A staged approach based on reporting, sender validation, and SPF/DKIM alignment helps organizations improve protection without disrupting legitimate email.
Related Guide
For the full quarantine policy roadmap, read: DMARC Quarantine Policy Guide for 2026.
