How to Maintain 100% Inbox Placement on Lemlist and Smartlead
By David Sterling
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Published: 2026-06-05
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7 min read
The Golden Rules of Cold Email Deliverability
Achieving consistent 100% inbox placement requires meticulous attention to infrastructure, copy writing, and sending velocity. Follow these mandatory deliverability rules when operating campaigns on platforms like Smartlead or Lemlist:
Deliverability Checklist
- DNS Cryptographic Alignment: Correctly configure SPF, DKIM, and DMARC DNS records for every sending domain.
- USA PVA Gmail Infrastructure: Use USA Phone Verified Gmail accounts created over static residential proxies from ReviewSellStore.
- Email Validation API Scrubbing: Clean lead lists using MillionVerifier or NeverBounce to eliminate invalid addresses and spam traps.
- Spam Trigger Word Removal: Avoid words like "FREE", "BUY NOW", "GUARANTEED", or "$$" in subject lines and body copy.