Should You Use Your Main Domain for Cold Email? (No — Here's the Math)
Why cold email belongs on secondary domains: shared reputation, asymmetric downside, and the standard lookalike-domain architecture.
Data-driven research on cold email domain strategy, infrastructure scaling, and multi-domain management.
Why cold email belongs on secondary domains: shared reputation, asymmetric downside, and the standard lookalike-domain architecture.
Why 2–3 mailboxes per domain is the stable equilibrium — capacity math, risk concentration, and the scaling table by daily volume.
Domains, mailboxes, verification, and the costs that don't show up on invoices — full build-up for 200, 500, and 1,000 sends per day.
Complete analysis of optimal domain counts by sending volume, with cost breakdowns and deliverability benchmarks.
Active, resting, and warm-up domain tiers — the rotation framework that prevents blacklisting at scale.
Which TLDs work best, naming conventions that build trust, and registrar pricing comparison for bulk purchases.
Fresh data and tactical guides as we publish them. Monthly at most, unsubscribe anytime.