The Complete Guide to Cold Email (w/o Claude Code)

Most cold email advice is recycled garbage. Send more. Personalise more. A/B test your subject line. Meanwhile your emails are landing in spam and your reply rate is 0.2%.

This guide is different. It's what we actually use at InboxKit - the infrastructure layer behind 150,000+ inboxes sending for 1,000+ B2B teams.

No theory. No fluff. Just the system.

What's Inside:

Infrastructure That Doesn't Get You Killed How to set up domains, inboxes, and sending accounts that survive Google's 2025 crackdown — not get crushed by it.

Complete Authentication Mastery SPF, DKIM, DMARC — copy-paste DNS setup so your emails actually arrive where they're supposed to.

The 30-Day Domain Warmup Playbook Build real sender reputation from day one. Skip this and nothing else matters.

Copy That Actually Gets Replies Email structures and frameworks getting 30%+ open rates. What to say, how to say it, and what to never write again.

Multi-Domain Scaling Without Burning Everything Down How to send 500+ emails daily across a clean infrastructure without torching your domains.

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