Free email resources
Free email marketing resources in one place: field guides, articles, product news, downloadable checklists, free tools, the pricing dataset, and the glossary.
Email guides
Five long-form guides to the parts of email that decide whether your mail lands. Each one anchors a cluster of shorter pieces.
Email guides and articles
Articles on deliverability, business email, newsletters, and outreach. Written from a mail system we run ourselves.
Product news
What we are shipping, what we are testing, and what the numbers behind it look like. Including the warm-up work in progress.
Free downloads
Our pricing dataset as CSV and JSON, plus the checklists we actually run: DNS setup, the pre-send gate, and the warm-up ramp.
Free email tools
Check any domain’s SPF, DKIM, DMARC and MX against live DNS, analyze raw email headers, build a DMARC record, and price fourteen providers.
Compare email providers
Head-to-heads, alternatives, and what fourteen providers actually charge, with the date we checked each number.
Email glossary
Thirty-five terms in plain English, each with the number that matters and where to read further.
How we work
Our sourcing rules, the no-affiliate policy, the AI-assistance disclosure, and how to tell us we got something wrong.