Watch comparable senders before a campaign exposes the problem.
Build a baseline by provider and stream, schedule comparable tests, alert on meaningful movement, and keep the report history that explains the trend.
Read the guideBetter email starts with better evidence.
Field guides for reaching the inbox, reading provider signals, and fixing the parts of your sending system that actually move placement.
More field guides — page 4
2 articles on this page
One message. Two provider decisions.
Gmail and Outlook use different reputation evidence, policies, and account contexts. Diagnose the provider split without flattening it into one average.
2 min read