Cold email guides, free and sourced.
Each guide answers one question completely, with the sources linked. They’re adapted from The Cold Outbound Playbook; the book adds the templates, the setup task lists, the scaling maths and the 90-day plan.
Why cold emails go to spam
The seven checks, in the order to run them.
SPF, DKIM and DMARC for cold email
Every record for Google Workspace and Microsoft 365, and a two-minute test.
Cold email benchmarks for 2026
Reply rates, bounces, complaints and sending limits, with sources.
How many cold emails per mailbox per day
Start at 10, settle at 15–25, never above 30, and how many mailboxes that means.
Is cold email legal? By country
US, UK, EU, Germany, Austria, Canada, Australia, India and Singapore.
Cold email from India to the US, UK and EU
Reply windows in IST, summer and winter, plus pricing and the law.
How many follow-ups to send
Instantly vs Belkins vs Hunter, and the default with what each step does.
Google Workspace vs Microsoft 365
Where to start, when to add the second, and how each one fails.
How to warm up a cold email domain
A week-by-week schedule, the settings that matter, and the debate.
Cold email tools
A calculator, a DNS checker, a DMARC generator, an email checker and a software cost calculator.
Cold email glossary
Every term, in one line each.
Cold email software, reviewed
Prices, limits and features from each vendor’s own pages, every fact dated and sourced.