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Posts tagged "sender authentication"

Why your cold emails go to spam in 2026 (and how to fix it before you send)

Aug 24, 2026

Filed under: cold email deliverability, cold email setup checklist, cold email spam 2026, cold emails going to spam, cold outbound, email deliverability 2026, free skill, gmail sender requirements 2026, microsoft bulk sender rules, one-click unsubscribe rfc 8058, sender authentication, skill md, spam complaint rate, SPF DKIM DMARC

Why your cold emails go to spam in 2026 (and how to fix it before you send)

Cold emails fail more from setup than from copy. This free SKILL.md runs a pre-send deliverability audit (SPF, DKIM, DMARC, list hygiene, spam-complaint math) and hands back a go or no-go with the fix for each failure, grounded in the...