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#
- Dozens of topic folders nobody files into.
- Rules that skip the inbox for senders who occasionally send urgent mail.
Fix and re-verify#
- Create a small set of labels by required action, not topic.
- Auto-archive notifications and route newsletters to a digest.
- Star or flag anything from key contacts or where you are directly addressed.
- Review rules quarterly and delete stale ones.
Frequently asked questions#
Labels or folders: which is better?
Labels allow one message to carry several states. Folders are simpler. Either works if the taxonomy is small.