Cold Email Infrastructure at Scale

Overview

We designed and deployed a complete cold email infrastructure from scratch — domains, warmup, lead sourcing, email verification, and campaign management.

The Challenge

No infrastructure for consistent lead generation, manual prospecting.

Our Approach

• —Set up multiple sending domains with proper DNS, DKIM, and DMARC
• —Configured email warmup to build sender reputation
• —Built automated lead sourcing and verification pipeline
• —Designed multi-variant email sequences with A/B testing

Impact

• —Scaled from 0 to 1,500 emails/day
• —Deliverability consistently above 95%
• —Fully automated lead sourcing and verification
• —Predictable pipeline of qualified leads

Tools Used