<b>Spam filters in 2026: what actually trips them</b>

<b>Spam filters in 2026: what actually trips them</b>
The resources that killed the 'avoid the word FREE' folklore.

🚀 Deliverability
— Word to the Wise on content filtering — modern filters weight reputation and engagement far above keyword lists; read this and delete your 'spammy words' spreadsheet.
— SpamAssassin rule docs — if you must check content, check against the actual rules, not a 2012 blog post.
— Litmus spam-testing guide — how seed-based spam scoring works and where it misleads.
— Gmail's 'why messages go to spam' help page — boring, official, and clearer than most paid courses.

Made the cut because they replace superstition with the real ranking signals: authentication, engagement, list hygiene.

Saved you ~2 hours of editing subject lines that were never the problem.