Dropped threads cost deals and goodwill. Tracking turns follow-through from memory into a system.
The metrics that matter#
- Authentication pass rate: share of mail passing SPF, DKIM, and DMARC alignment. Healthy: 99% or higher.
- Spam complaint rate: Gmail enforces at 0.3%; stay under 0.1%.
- Hard bounce rate: under 2%; above 5% triggers platform reviews.
- Inbox placement: above 90% across major providers via seed tests.
- Engagement: click and reply rates by segment; opens are unreliable after Mail Privacy Protection.
Where to read them#
- Google Postmaster Tools for Gmail domain reputation, spam rate, and authentication.
- Microsoft SNDS and JMRP for Outlook.com IP reputation and complaints.
- Your ESP's delivery and bounce reports.
- DMARC aggregate reports for authentication by source.
Improving the numbers#
- Tag or snooze every message that needs a reply from someone else.
- Set a default follow-up window per contact type.
- Let an assistant draft the follow-up so the action is one click.
- Review the waiting list each morning.
Frequently asked questions#
How long should I wait before following up?
Two to four business days for most professional asks; sooner if there is a stated deadline.