Email Infrastructure & Deliverability Specialist (1M+ Database / Cold Outreach)

We are a brand-new operation building a high-volume cold email outreach system from the ground up. We have a raw database of 1000,000+ contacts. Our goal is to: Clean, validate, and enrich this database. Build a cold email infrastructure (separate from marketing ESPs) capable of scaling to 500,000 emails per day. Ensure each daily campaign achieves industry-leading inbox delivery rates (not spam folder). We are in the infancy stage—we need you to help us architect the entire ecosystem, including the tech stack, sending rotation, and warm-up protocols. Required Expertise: Proven track record building cold email systems at scale (500k+ emails/day). Please provide measurable results (e.g., "Achieved 98% inbox placement for 750k daily sends"). Deep expertise in ISP mechanics (Gmail, Outlook, Yahoo post-2024 updates), throttling limits, and reputation recovery. Hands-on experience with cold email platforms. Strong understanding of domain rotation, email authentication, and blacklist remediation.