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#
- Feature tours instead of outcome-focused guidance.
- Time-based sequences that ignore what the user already did.
Fix and re-verify#
- Identify the one action that defines activation.
- Send a welcome immediately with a single clear next step.
- Trigger nudges on inaction (no login in 3 days) and progress (completed setup).
- Exit users from the sequence once activated and move them to lifecycle mail.
Frequently asked questions#
How long should an onboarding email sequence be?
Cover the first 14 to 30 days with 5 to 8 messages, mostly triggered by behavior rather than fixed days.