Symptoms#
- Messages landing in spam despite previously good placement
- Bounces mentioning policy, authentication, or reputation
- Provider dashboards showing a drop in reputation or authentication pass rate
Diagnosis steps#
- Confirm the configuration is live: query DNS from an external resolver and check the sending platform's settings page.
- Send to a seed mailbox and read the full headers, especially Authentication-Results.
- Compare the domains in From, Return-Path, and DKIM d= for alignment.
- Check provider dashboards (Google Postmaster Tools, Microsoft SNDS) for reputation and error rates.
- Review recent changes: new vendors, DNS edits, list imports, volume spikes.
Likely causes#
- Automations that keep sending after a contact converts.
- No suppression between overlapping journeys, causing message pile-ups.
Fix and re-verify#
- Map the lifecycle stages and the one behavior that defines each transition.
- Build a welcome series first; it has the highest engagement of any automation.
- Add onboarding nudges triggered by inaction (did not complete setup in 3 days).
- Create a win-back series for customers approaching churn signals.
- Review each automation quarterly; stale content erodes trust.
Frequently asked questions#
What automations should I build first?
Welcome series, abandoned action recovery, and post-purchase or post-signup onboarding.