Free downloads

Free checklists and AI prompts

Free email deliverability checklists as prompts for your AI agent, plus our pricing dataset. No email address, no signup, nothing to unsubscribe from.

Every file here is free and ungated: no address to unlock a prompt, no account to open a checklist. Each one below comes as a prompt built for your AI agent, with our own deliverability rules already in it, and as a plain page to read. Already running mail through LetterDuck? Connect your agent over MCP and skip the copy-paste.

Free data

The email pricing dataset

Every published plan from fifteen providers as CSV and JSON, with prices, limits, the date each was checked and a link to the source page.

Get the CSV or JSON →

DNS worksheet

The email DNS worksheet

The DNS records a sending domain needs, as a prompt for your AI or a plain reference: MX, SPF, DKIM, DMARC and a tracking CNAME, with the order and the traps.

Before you send anything →

Pre-send checklist

The pre-send checklist

An email deliverability checklist of ten checks to run before a campaign leaves: suppression applied, authentication passing, unsubscribe headers, seed tests.

Before every campaign →

Warm-up schedule

The 28-day warm-up schedule

An email warm up plan for a new sending domain, day by day: target volume, who to send to, and the complaint and bounce gate that holds before each increase.

Once your records pass →