# Should I use a separate domain for cold email?
> Usually yes if you also send customer mail from the root domain. A complaint spike on founder@company.com can hurt the mail your customers need.
- HTML: https://omentir.com/help/should-i-use-a-separate-domain-for-cold-email
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Primary domain: invoices, product, password resets. Cold domain: a lookalike you control (getcompany.com, trycompany.com) with matching branding in the signature so you are not hiding.

You still authenticate it, warm it, and tell the truth in the From name. A random domain that does not match the website is a phishing look. Buy something a human can map to you.

Redirect the sibling to the main site. Put the real company in the signature. If someone asks, you are sending from a mail domain so product email stays clean. That is an honest sentence.

Do not use 40 random domains as a rotating laundromat. Providers and buyers have seen that. A couple of well-warmed domains beat a farm.

If you send 20 highly targeted emails a week from the founder address and you accept the risk, some people still do that. It is a choice. It is not free of consequences.

## Related

- [How long should I warm up a cold email domain?](https://omentir.com/help/how-long-to-warm-up-a-cold-email-domain.md)
- [How many inboxes do I need for cold email?](https://omentir.com/help/how-many-inboxes-for-cold-email.md)
- [Do I need SPF, DKIM, and DMARC for cold email?](https://omentir.com/help/do-i-need-spf-dkim-dmarc-for-cold-email.md)

## Frequently asked questions

**Will a sibling domain hurt deliverability?**

Unknown siblings start at zero reputation. Warm them. They protect the root. That is the trade.

**Should the From name still be me?**

Yes. People reply to people. The domain is plumbing.

**Is a Google Workspace alias enough?**

An alias on the same domain still uses the same reputation. That does not isolate customer mail.

**Does this help with GDPR?**

No. Domain choice is deliverability. Lawful basis is a different job.

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