Email Deliverability Benchmarks: Live Inbox & Auth Data

Quoted on this wiki

Every place a page here uses this source, in the order the words come in it.

1. Subject Line Quality “Subject line spam trigger analysis” Broken Links

   In Content-based spam filtering

2. Body Content Analysis “Content spam pattern detection” Short URL Usage

   In Content-based spam filtering

3. Excellent “Global deliverability remains challenging in 2026. Improved SPF/DKIM/BIMI adoption helps, but increased spam filtering and stricter ISP policies have tightened inbox placement.” Sender Authentication & Infrastructure

   In Email deliverability benchmarks

4. 91% good “Strong adoption continues with 9% still lacking basic SPF records.” DKIM Adoption

   In Email deliverability benchmarks