MCP

Writing the email — The lines themselves, from subject to P.S.; four live debates run as named schools: subject length, body length, CTA style, and templates

This module covers the parts of one email, from the subject line to the P.S. What the campaign should argue — offer, angle, proof — belongs to Offer and messaging; how deeply to personalize each send is decided in Personalization. Here it is the lines themselves.

The seven pages:

  • Subject lines — Two subject schools split by corpus — one-to-four words for sales, 36-50 characters for PR — and the honesty line: faked Re: prefixes are illegal in the US.
  • Opening lines — The first line's double duty as preview text, openers that start in the prospect's world rather than yours, and the 5x5x5 research time-box.
  • Body frameworks — Four named structures for the middle of the message, from the REPLY Method to two-to-three-line spears, with fit criteria and a buyer-first default.
  • Calls to action — One ask per email, interest-based CTAs measured roughly 44% better than meeting asks across 304,000 cold emails, and when to switch to a direct ask.
  • Length, readability, formatting — The 25-100-word, 5th-grade band from a 231,818-email benchmark, the ultra-short dissent, and why no corpus backs long cold emails.
  • Signatures and P.S. — The minimal signature — name, role, company, at most one link — a single one-sentence P.S., and the honest note that no large corpus measures either.
  • Templates vs frameworks — Two schools on reuse — frameworks that regenerate copy versus templates that decay as they saturate a market — and when a template is genuinely safe.

Four genuine debates run through this module: subject length, body length, CTA style, and templates versus frameworks. Each debate page presents the disagreement as named schools with fit criteria, observable tells, and a stated default — so you can choose deliberately, or detect which school an existing campaign already follows.