Cold Email Deliverability Checklist 2026

Follow this 10-point checklist before launching your next campaign to reduce avoidable authentication, reputation, and spam-filter problems.

• 1. SPF Record Published
• 2. DKIM Keys Active
• 3. DMARC Policy Set
• 4. Custom Tracking Domain
• 5. Forwarding & Redirects
• 6. 14-Day Warmup Completed
• 7. List Cleaned & Verified
• 8. RFC 8058 One-Click Unsubscribe
• 9. Spintax & Variants
• 10. Plain Text Fallback