Mistake: sending cold from your primary brand domain

Mistake: sending cold from your primary brand domain
Firing cold from yourcompany.com means one spam-trap hit can tank the deliverability of your invoices, support, and sales replies. People do this to 'look legit' and gamble the whole business's email.

The fix: register lookalike sending domains (get-yourcompany.com, yourcompany.io), point them at the brand site with a 301, and isolate all cold there. Burn and replace freely. Tools like MailReef or your registrar bulk-register and auto-configure DNS.

Pros / Cons of secondary domains:
— Pro: primary domain reputation is firewalled
— Pro: disposable — burn and rotate without business impact
— Con: lookalikes carry slightly lower initial trust
— Con: more DNS records (SPF/DKIM/DMARC) to maintain per domain

Verdict: 5/5. Never cold-send from the domain your payroll emails run on.

Who it's for: founders sending from their main domain to 'build trust.'