Cold email can damage a domain's reputation, so it must come from domains you can afford to lose. Buy brand-matching sending domains, point each at your site, and configure MX, SPF, DKIM and DMARC before the first send.
What is at stake
If your main domain's reputation drops, invoices go to spam, password resets fail, and support replies vanish. A sending domain carries none of that. If it burns, you retire it and move on.
Setup checklist
- Pick names with the domain generator. They should be recognisably yours.
- Register with WHOIS privacy. Same registrar as the main domain is fine.
- Redirect the root to your main site so curious prospects land somewhere real.
- Create inboxes on Google Workspace or Microsoft 365. Real names, real photos.
- Add MX records so replies and bounces arrive.
- Add SPF with one include for your provider.
- Enable DKIM in the provider admin panel and publish the key.
- Add DMARC at p=none with a rua address.
- Run the domain check. Every row should be green except DMARC policy, which you raise later.
- Start warmup. No cold sends for the first week.
Sending domain name generator
Generate brand-matching names for cold email sending domains.
Open the toolGenerate brand-matching names for cold email sending domains.
Questions
Will prospects trust an email from try-acme.com?
Yes, if the name clearly references your brand and the signature links to the real site. Random or unrelated domains are what raise suspicion.
Can I use a subdomain like outreach.acme.com instead?
You can, but a subdomain's reputation bleeds into the parent in some filters. Separate domains are the safer isolation.