Postmark DMARC Failing: Fix DMARC Alignment & Policy
Your Postmark DMARC policy is failing or misaligned
Fix within 24 hours.
Check your DMARC configuration:
Use DMARC record checker to review your policy
Check if Postmark is DKIM and SPF aligned
Verify domain in Postmark matches your DMARC domain
What Could Be Causing This?
DMARC Policy Mismatch with Postmark Domain
Most CommonIf your DMARC policy is strict but Postmark domain isn't aligned, emails will fail.
How to confirm:
Check DMARC record policy. Verify Postmark domain matches your sending domain alignment.
Fix Playbook
Step 1: Set DMARC to Monitor Mode, Then Enable Enforcement
- Set DMARC policy to p=none (monitor)
- Monitor for 1-2 weeks
- Once Postmark alignment is confirmed, move to p=quarantine
- After 1-2 weeks at quarantine, move to p=reject if desired
Postmark-Specific Note:
Postmark customers should start with DMARC monitoring — phased enforcement prevents email loss.
Prevention Checklist
- Monitor DMARC aggregate reports weekly
- Keep Postmark domain verified
Free Diagnostic Tools
Stop Fixing Deliverability Issues Reactively
The problem you just fixed probably cost you 20-30% of revenue while it was happening. InboxEagle would have detected it within 2 minutes and alerted you before placement dropped.
Real-time monitoring, AI diagnosis, and 24/7 alerts for every reputation change.
Start 14-Day Free Trial — No Card Needed