Why Google Workspace is the default sending provider
Most startups, agencies and small businesses read their mail in Gmail, and Gmail's filters treat mail that originates from Google's own infrastructure, with a clean Workspace domain behind it, more kindly than mail from anywhere else. A Workspace mailbox on a domain you own, authenticated properly and warmed patiently, is still the most reliable way to land a cold email in a Gmail inbox.
What does not work, and gets people suspended, is shortcuts: bought accounts, aged Gmail addresses, or fifty users crammed onto one domain. Google's terms are clear, its detection is good, and a suspension takes every domain in the account with it. Everything below is the legitimate version, which also happens to be the one that keeps working.
Google's published limits, and the number that actually matters
| Limit | Google publishes | What we recommend for cold email |
|---|---|---|
| Messages per user per day | 2,000 (500 during trial) | 8 to 10 after warm-up; 5 to 15 is the hard band |
| Total recipients per day | 10,000 | Never reached at cold volumes |
| Unique external recipients per day | 3,000 | Never reached at cold volumes |
| Users per domain | No practical limit | One sending user per domain by default; up to three once the domain has history |
| Time to full volume | Not stated | Two to three weeks of warm-up |
The published figures are from Google's Workspace sending-limit documentation at the time of writing. The recommendation is ours, from placement data across the fleets we run.
The setup, step by step
- Secondary domains. Register lookalikes of your brand; never send cold from the domain your customers know. Point each root to your real site. Budget two or three domains per 30 daily emails you want to send.
- Workspace users on those domains. Created through Google or a reseller, one seat each, with real names of real people on your team. The platform creates the Workspace customer, adds and verifies each domain, creates the users, and keeps the credentials in its vault; nothing is stored in a spreadsheet.
- DNS that passes. MX records for Google, SPF with Google's include, DKIM with a 2048-bit key on the "google" selector, DMARC at monitoring first and quarantine once the reports are clean, and the Postmaster Tools verification record. The platform writes all of it through the registrar and shows every record in its DNS console before it goes live.
- Sending access without passwords. The platform connects each user with an application-scoped credential; a person's Google password is never typed into it.
- Warm-up, then the cap. Warm-up starts at Google's floor and rises a step every day to the target, with replies threaded in and every warm-up message kept out of your working inbox. When warm-up ends, each mailbox sends at most its daily cap, and tracking stays off.
- Reading the signals. DMARC aggregate reports land in a dedicated mailbox the platform reads; Postmaster Tools shows reputation; the placement test tells you where a message from each mailbox actually lands at Gmail and Outlook. A domain that starts slipping is paused before replies dry up, not after.
The day-by-day ramp
A new Workspace mailbox has no history, and Google's filters are quickest to punish a sudden change. The ramp below is the shape the platform runs; exact numbers depend on the provider floor and the target you set.
| Days | What happens | Cold campaigns |
|---|---|---|
| 1 to 3 | A handful of warm-up messages a day to seasoned mailboxes; replies come back and are threaded | None |
| 4 to 10 | Volume rises by a fixed step each day; opens, replies and moves out of spam accumulate | None |
| 11 to 16 | Volume reaches the target; the platform watches bounce and refusal signals | None |
| 17 to 21 | Steady state; warm-up continues at a maintenance level | Start at the low end of the band |
| After 21 | Maintenance warm-up runs alongside campaigns for the life of the mailbox | 8 to 10 a day per mailbox |
What it costs
| Item | Price | Notes |
|---|---|---|
| Workspace seat | $8.40 per user per month | Google's flexible-plan rate, billed through the platform |
| Mailbox setup | $5 one-time per user | Customer, domain verification, DKIM, access, warm-up start |
| Domain | About $12 per year | Registered in your name; DNS written for you |
| Ten mailboxes, all in | $84 a month plus $50 once plus about $120 a year in domains | Sends 80 to 100 cold emails a day after warm-up |
| Campaign plan | $0 trial, $39 Basic, $94 Pro per month | Unlimited mailboxes and warm-up on every plan |
The calculator prices your exact volume with one, two or three users per domain and shows the monthly total before you approve anything.
Common mistakes we see in accounts people bring to us
- Sending cold from the primary Workspace domain, then wondering why customer invoices land in spam.
- DKIM never enabled because the DNS console showed a green tick for SPF and nobody checked further.
- DMARC at reject on day one, which blocks the very mail you are trying to warm.
- Open tracking on, link tracking through a shared domain, and images in the first email.
- Forty sends a day from day one because a limit table said 2,000.
Questions, answered straight
- Is it legal to buy Gmail or Google Workspace accounts for cold email?
- Buying pre-made accounts breaks Google's terms and those accounts are routinely suspended. What is legitimate is creating Workspace users on domains you own, through Google or a Google reseller, paying the seat price, and sending within the rules. That is what the platform does: it provisions users on your domains, and you own everything.
- How many cold emails per day from one Google Workspace mailbox?
- Google publishes 2,000 messages per day per user. For cold email we recommend 8 to 10 per mailbox per day after warm-up and treat 5 to 15 as the hard band. The daily limit is not the constraint; the spam filter's tolerance for a new domain writing to strangers is.
- How long does warm-up take on Google Workspace?
- Two to three weeks from the first warm-up message to full volume. Domains, users and DNS are ready the same day, so plan three weeks from purchase to full-speed campaigns.
- Do I need Google Postmaster Tools?
- Yes, for every sending domain. It is the only place Google tells you your domain and IP reputation and your spam-complaint rate directly. The platform adds the verification record when it writes your DNS, so each domain appears there from day one.
- Should I turn open tracking on?
- No. Tracking pixels are one of the most reliable spam signals for cold mail. The platform ships with tracking off; measure replies, which are what you want anyway.
Published 19 September 2026. Updated 19 September 2026. Written by the team that runs the infrastructure; numbers come from the platform's own provisioning and sending, and from the providers' published documentation at the time of writing.