Buy Google Workspace Mailboxes for Cold Email

Work backwards from the number of new prospects you want to reach per day.

1. Daily new contacts. Say 600 first touches per day.
2. Follow ups. A three step sequence roughly doubles or triples daily sends once it is running. Plan for around 1,500 total sends per day in that example.
3. Per mailbox volume. Many operators keep cold sends per mailbox in the range of 20 to 40 a day once warmed. Pick a conservative number. At 30, 1,500 sends needs about 50 mailboxes.
4. Mailboxes per domain. Two or three is a common starting density. At three, 50 mailboxes needs about 17 domains.
5. Headroom. Add 10 to 20 percent spare mailboxes so you can rest or replace a mailbox without dropping volume.

Write these numbers down before talking to any vendor. A provider that tells you to put 1,500 sends a day through five mailboxes is selling you a short life.

Use domains dedicated to outbound. Never your main company domain. Choose names a prospect would recognise as you: brand plus a short word, or a close variant on .com or .co. Avoid hyphenated or number stuffed names that look generated. Redirect each domain to your main website. Keep the registrar account in your company's name.

Some infrastructure providers can buy domains for you, and some let you bring your own. Both are fine as long as the domain is registered to you.

There are three common routes.

Direct from Google. You create tenants, add users, publish DNS, and handle warmup yourself. Maximum control, most labour. Works at small scale.

Reseller or pooled offer. Cheapest per seat. Ask exactly what licence it is. Education, nonprofit, or unofficial tenants are a common cause of mass flags and suspensions.

Dedicated Google Workspace infrastructure provider. Official seats on your dedicated domains, with DNS and warmup automated. You pay for the ops being done for you and for repeatability across many domains.

Whichever route, ask for admin console access and 2FA on every domain. If you cannot log into the admin panel, you are renting, not owning.

For each domain you need:

MX records pointing to Google.

SPF that includes Google: v=spf1 include:_spf.google.com ~all (add other senders only if they genuinely send from that domain).

DKIM generated in the Workspace admin console and published as a TXT record, then switched on.

DMARC at minimum v=DMARC1; p=none; rua=mailto:you@yourdomain.com, moving to a stricter policy once reports look clean.

Doing this by hand for 17 domains is a few hours of careful work and a few chances to typo a DKIM key. Automation removes that risk.

1. Run warmup for roughly two to three weeks before campaign volume.
2. Connect mailboxes to your sequencer (Instantly, Smartlead, n8n, or similar).
3. Start campaigns at a low daily cap per mailbox and raise it gradually.
4. Keep warmup running at a lower level while you send, if your warmup tool supports it.

When comparing offers, cost per mailbox is only one line. Also compare:

Is DNS setup included or billed per domain? Is warmup included, optional, or separate? Are domains included or bought separately? What happens on a flagged or suspended mailbox? Is there a minimum term? Can you export credentials and leave?

The cheapest seat is often the most expensive mailbox once you count replacements and lost pipeline.

Buying for the slogan number. 1,000 emails a day is not a plan. The plan is per mailbox limits times mailboxes times domains.

Skipping spare capacity. Without spares, one flagged mailbox means a campaign gap.

Buying domains and mailboxes on the same day you need to send. Warmup takes time; buy two to three weeks before launch.

Using the primary domain just for a test. One bad test can affect your company email.

Treating mailboxes as a sequencer feature. They are a separate layer with separate risks.

ColdMail sells the mailbox layer, not campaigns. You get official Google Workspace mailboxes on dedicated domains, with SPF, DKIM, DMARC, and MX published automatically and an official admin panel per domain with 2FA. AI warmup is available as an optional add on. Health indicators cover Gmail, Outlook, and Yahoo. Mailboxes are ready to connect in Instantly and Smartlead using the methods those tools support, and also work with n8n and other tools. There is an API for teams provisioning programmatically.

It suits agencies and SDR teams buying in batches who would rather not hand build DNS for every domain. Book a Strategy Call at coldmail.app where you bring a target volume and leave with a domain and inbox plan, whether or not you buy.