Provider Deliverability Guides
Provider-specific guidance for Gmail, Yahoo, Microsoft, and spam filter internals.
5 articlesHow do I get my emails into Gmail's Primary inbox?
Gmail routes mail by domain reputation and engagement signals. Meet the 2024 bulk sender requirements and land in Primary instead of Promotions or Spam.
Updated March 11, 2026How do I set up the Gmail complaint feedback loop?
Register your domain in Google Postmaster Tools to access aggregate spam complaint data and domain reputation trends via Gmail's FBL.
Updated March 12, 2026How do I set up the Yahoo complaint feedback loop?
Create postmaster@ and abuse@ mailboxes, then register with Yahoo Mail Postmaster to receive spam rate reports when users mark your email as junk.
Updated March 12, 2026How do I set up Microsoft's JMRP and SNDS feedback programs?
SNDS reveals how Microsoft scores your sending IPs; JMRP forwards junk-marked emails so you can suppress complainers. Setup steps for both programs.
Updated March 12, 2026How does SpamAssassin scoring work?
SpamAssassin runs hundreds of rule-based tests per email. Understand the scoring threshold, common triggers, and how to reduce your spam score.
Updated March 11, 2026