Deliverability
Health score, seed drops, blacklist monitoring, what to do when scores drop.
How the infrastructure health score works
The 0–100 score, what inputs it uses, how to improve it.
5 min read·Updated Apr 8, 2026
Blacklist monitoring across 14 sources
Which blacklists Inboxlee monitors, why these specifically, and what to do on a hit.
5 min read·Updated Apr 4, 2026
Seed list placement tests
How daily seed tests work, what they measure, when they fire alerts.
4 min read·Updated Apr 1, 2026
Reputation recovery playbook
When a domain or mailbox loses reputation, here is the path back.
6 min read·Updated Mar 26, 2026
Reading Gmail Postmaster Tools
Connecting Postmaster Tools, what each metric means, when to act.
5 min read·Updated Mar 22, 2026