How do you set up cold email without burning your domain?

Illustration: the BSM rabbit sending emails from separate small mailboxes while the main house stays protected

Never send cold email from the domain your customers know. Buy a few look-alike sending domains, set up a handful of inboxes on each, warm them up for two to three weeks, then send a small number of emails per inbox per day to lists built from real buying signals. Your main domain stays clean, and if a sending domain gets hurt, you replace it.

The setup, step by step

  • Separate sending domains. Variations of your brand name, each pointing to your real site. Your main domain never sends.
  • A few inboxes per domain, with SPF, DKIM and DMARC set up on every one.
  • Warmup first. Two to three weeks of automated warmup before any real email goes out, and keep warmup running after launch.
  • Start low. A handful of emails per inbox per day, spread across many inboxes, and only raise it when replies and bounces stay healthy.
  • A real footer. Your company name, a postal address and a simple way to opt out, like 'Reply no and we'll stop'.

Lists and copy

  • Build lists from signals: a recent raise, a hiring post for the role your product helps, a new leader in their first 90 days, a launch.
  • Verify every address before it's sent to. Bounces are what hurt a domain fastest.
  • Keep emails short, tied to the signal, and give something first: an audit, a teardown, a free setup.
  • Remove anyone who says no, straight away.

What to measure

Not opens. Measure replies, positive replies and booked meetings, then cost per meeting against what a customer is worth. That's the same payback line you use for ads.

Illustration only. Big Shorter Media does not guarantee growth, revenue or results.

Free playbook

Get your free go-to-market playbook.

In your inbox within 24 hours: what a customer can cost you and still pay back, three Meta ads, three outbound emails, and the one place your funnel leaks. You keep it whether we work together or not.

  • What a customer can cost you and still pay back, worked from your pricing.
  • Three Meta ads we'd run first.
  • Three outbound emails to real companies that could buy from you.
  • Your funnel, with the one place it's leaking called out.

Ready to put $10k+ a month behind growth, ad spend included.