Naming Cold Email Domains and Checking They're Available in Bulk
Name cold email domains as your brand plus a short neutral word, such as getacme.com, tryacme.com or acmehq.com, and check the whole shortlist for availability in one pass. Avoid words that announce bulk mail, avoid hyphens and numbers, and never pick anything that resembles another company's brand. The recipient should be able to tell who you are from the domain alone.
Below are the patterns that work, the ones to avoid, and a quick way to go from a brand name to a set of registered, authenticated domains.
Why the name matters at all
A cold email is read by a stranger who has never heard of you, and the sender domain is one of the few things they can check. If the domain clearly belongs to the company in the signature, the email reads as honest. If it does not, the reply rate suffers and the spam-button risk goes up, and complaints are what damage domains fastest.
Google's sender guidelines ask senders not to impersonate other domains or use deceptive headers. A domain name that borrows another brand's look is the same problem in a different place.
Naming patterns that read as legitimate
| Pattern | Example | Notes |
|---|---|---|
| get + brand | getacme.com | Very common, widely recognised |
| try + brand | tryacme.com | Common for software |
| brand + hq | acmehq.com | Reads as a company domain |
| brand + team | acmeteam.com | Works for services businesses |
| brand + app / labs | acmeapp.com, acmelabs.com | Fits product companies |
| brand + country | acmeuk.com | Useful if you sell in one market |
| Your country TLD | acme.co.uk | Natural if your main domain is .com |
Each of these looks like something a real company would own. Combine them with the same logo, signature and website redirect as your main domain and a prospect who checks will find a consistent picture.
Names to avoid
- Bulk-mail words:
acme-outreach.com,acmemail.com,sendacme.com. They signal a sending domain to recipients and some filters. - Hyphens and digits:
acme-1.com,acme2.com. Common in throwaway registrations. - Close misspellings of your own brand:
acrne.comforacme.com. Recipients cannot tell it from phishing. - Anything resembling a customer's, partner's or competitor's brand. This is the serious one.
- Look-alike characters. A Cyrillic letter in place of a Latin one is a phishing technique, and Google asks senders to follow Unicode Technical Standard #39, which exists to detect confusable characters.
- Cheap TLDs that rank badly for abuse. See .com or other TLDs for cold email domains.
From brand name to available domains
Generate, check availability, screen for look-alikes, then register in one go.
- Generate candidates. The cold email domain generator takes your brand and produces variants in the patterns above.
- Check availability in bulk. Paste up to 100 names into the bulk domain availability checker. It asks each TLD's registry over RDAP and also checks DNS, and returns results in batches as the registries answer. A name shows as likely available only when there is no registry record and no DNS delegation; anything uncertain shows as unknown.
- Screen for look-alikes. Run your main domain through the lookalike domain checker to see which typo and homoglyph copies of it are already registered, and with mail servers. Avoid picking a secondary domain that sits next to one of those, and check your shortlist by eye against the brands you sell to and compete with.
- Register them together. One registrar, one renewal date, auto-renew on. A sending domain that lapses mid-campaign takes its inboxes with it.
- Authenticate on day one. SPF, DKIM, DMARC and a website redirect, before any warm-up. Our guide to setting up secondary domains has the records.
How many to register depends on your volume; how many sending domains you need has the arithmetic.
Why "unknown" is not "available"
Availability tools that guess send you to a registrar to buy names you cannot have. Some registries rate-limit lookups or do not answer at all, and a missing answer is not the same as a missing registration.
Our checker shows those rows as unknown and says why. If a name you want comes back unknown, check it directly at a registrar before planning around it.
A naming checklist
- Contains your brand name, spelled correctly
- Uses a neutral word (get, try, hq, team) rather than a bulk-mail word
- No hyphens, digits or look-alike characters
- On .com or your market's usual TLD
- Not confusable with another organisation's brand, or with a registered copy of your own
- Registered with auto-renew, alongside the rest of the set
- Website redirects to your main site
After the domains: the list
Good names make a cold email look legitimate. They do nothing for an address that no longer exists. New domains have no history to absorb early bounces, so the first lists sent from them matter most. Verify the list, separate catch-all addresses, and remove role addresses you do not mean to email before the first campaign.
SimpleVerifier checks each address with a live mailbox test. The first 100 email checks are free with a Google sign-in; monthly plans are on the pricing page.
Common questions
What is a good name for a cold email domain?
Your brand name plus a short, natural word, on .com or your market's usual TLD: for example getacme.com, tryacme.com, acmehq.com or acmeteam.com. A recipient who looks at the domain should be able to tell which company sent the email.
Should cold email domains include words like outreach or mail?
It is better not to. Words like outreach, mail, send or marketing tell the recipient the domain exists for bulk sending. Neutral prefixes and suffixes such as get, try, hq or team read like a normal company domain.
How can I check if many domain names are available at once?
Use a bulk availability checker that queries each registry. Ours takes up to 100 names, asks each registry over RDAP and also checks whether the name is delegated in DNS. A name shows as likely available only when neither has a record; anything uncertain is shown as unknown, not available.
Can I use a domain that looks like a competitor's or a customer's?
No. Names that imitate another organisation's brand look like phishing to filters and recipients, can breach trademark rights, and are the opposite of what Google's sender guidelines ask for. Check your shortlist by eye against the brands you sell to and compete with before registering.
Check your list before you send
Real mailbox checks over SMTP, and nothing is sent to the address. Sign in with Google and your first 100 email checks are free, no card. Plans for bigger lists are on the pricing page.