How to Warm Up a New Google Workspace Email (Step by Step)

You’ve set up a new Google Workspace address, you have a spreadsheet of people to email, and you want your first mail merge to land in their inbox. This guide shows you how to warm up a new Google Workspace email so that it does.

It’s for founders, small business owners, recruiters, small teams and site owners sending a mail merge from their own work address. You’ll get the setup to do first, a day-by-day plan, what you can do by hand, and the real limits of warmup: what it can fix and what only you control.

What does it mean to warm up a new Google Workspace email?

Warming up means building a sending history for a new inbox before you send in bulk. You start with a small number of emails a day and increase slowly, so Gmail and Outlook get used to your address as a normal, active sender.

Email providers judge every sender on its sender reputation: a running score of how trustworthy your address and domain (the part after the @, like yourcompany.com) look, based on how you’ve sent in the past and how people reacted. A brand-new address has no history at all. If its first act is to send 400 emails in an hour, it looks a lot like the spammers who set up fresh accounts to do just that.

Google’s own advice to senders follows the same idea. It recommends starting at a low volume to people who engage with your email, then increasing slowly over time, and it warns that sudden spikes without a sending history behind them can get you rate limited or hurt your reputation.

Do you need to warm up before your first mail merge?

If the inbox is new, or you’ve hardly sent from it, yes. The same goes for a new domain. If you’ve used the address for everyday email for months, you need less warmup, but you should still start your first bulk send smaller than your full list.

For a fuller look at what warmup is and when it’s worth it, read our explainer on what email warmup is and whether you need it.

What do you need to set up before you start warming up?

Set up three records on your domain first: SPF, DKIM and DMARC. Together they prove your email really comes from you. Google requires every sender to have at least SPF or DKIM, and recommends all three. Warming up an inbox without them is like building a reputation under a name nobody can check.

These records live in your domain’s DNS (the settings, kept at the company where you bought your domain, that tell the internet where your email and website live). Here’s the order to do things in:

1. Add your SPF record. SPF (Sender Policy Framework) is a short line of text that lists which servers are allowed to send email for your domain. If Google Workspace is the only thing that sends email for your domain, Google’s recommended record is the one below. Add it as a TXT record with the host set to @. If something else also sends email for you, such as a website contact form, it needs to go in the same record, because a domain should have just one SPF record.

   v=spf1 include:_spf.google.com ~all
   

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   Here, _spf.google.com is Google’s list of its own mail servers. Our step-by-step guide to SPF for Google Workspace covers combining it with other services.

2. Turn on DKIM. DKIM (DomainKeys Identified Mail) adds a digital signature to every email you send, which receiving servers check against a key published on your domain. In the Google Admin console, go to Apps, then Google Workspace, then Gmail, then Authenticate email. Generate a 2048-bit key, add it to your DNS as a TXT record (Google gives you the host name, usually google._domainkey), and only then click Start authentication. On a brand-new account, Google says the key may not be available until 24–72 hours after Gmail is turned on. Our guide to turning on DKIM in Google Workspace walks through each screen.

3. Wait for them to start working. Google says SPF and DKIM can each take up to 48 hours after you add them. Use this time to clean your contact list (more on that below).

4. Add a DMARC record. DMARC tells receiving servers what to do with email that claims to be from your domain but fails SPF and DKIM. Google recommends adding it after SPF and DKIM have been working for at least 48 hours, and starting with a policy of none, which means “just report, don’t block anything yet”. Add it as a TXT record with the host _dmarc.yourcompany.com (some DNS hosts want just _dmarc):

   v=DMARC1; p=none; rua=mailto:dmarc-reports@yourcompany.com
   

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   The rua part is where daily reports go. Google suggests a separate mailbox or group for them, since there can be a lot. Our guide to DMARC for Google Workspace explains when and how to tighten the policy later.

5. Check everything is in place. Before you send a single warmup email, confirm all three records are working. You can check your domain settings free, with any problems explained in plain English.

While you’re waiting on DNS, you can also add your domain to Google Postmaster Tools, a free Google dashboard that shows your spam rate and domain reputation. It only covers email sent to personal Gmail addresses (ending in @gmail.com or @googlemail.com), and it may show nothing until you send enough email each day, so don’t worry if it’s empty during warmup.

How long does it take to warm up a new Google Workspace email?

Plan on 4–12 weeks of gradual sending after your setup is done. You’ll often see improvement in the first week, but most new inboxes need that long before they can send at full volume comfortably.

How long yours takes depends on how many emails you want to send a day, how often you send, and how people react. Google notes that you can increase volume more quickly if you send every day rather than once a week, and that the more you plan to send, the more slowly you should grow.

If your Google Workspace account is still on a free trial, there’s an extra limit. Trial accounts can send only 500 emails a day, and Google doesn’t raise that during the trial. After you switch to a paid plan, the limit goes up automatically once your domain has paid at least $100 in total, which Google says can take up to 75 days. Paid accounts can mail merge up to 1,500 recipients a day. For every limit in one place, see our guide to Gmail and Google Workspace sending limits.

For a closer look at each week, see our day-by-day email warmup timeline.

What does a warmup schedule look like?

A cautious schedule starts at about 20 emails a day for a new inbox and adds no more than about a fifth each day. These are our own starting points, not Google rules, and you stop rising as soon as you reach your own goal.

Here’s what that looks like for someone working toward 500 emails a day:

If your goal is 100 a day, you’d reach it around day 10 and hold there. If you’ve used the inbox for everyday email for a month or more, you can start nearer 40 a day.

Three rules matter more than the exact numbers:

• Spread each day’s sending out. Google advises a steady rate rather than bursts. Most mail merge tools let you send in small batches through the day instead of all at 9 a.m.
• Never jump. Google gives doubling your usual volume overnight as an example of what can trigger rate limits or a reputation drop.
• Drop back when something looks wrong. If you see more bounces or delays than usual, Google’s advice is to send less until the errors fall, then increase slowly again.

To get a plan built around your own goal and start date, use the email warmup schedule calculator. For a quick starting number, see how many emails you can send a day without going to spam.

How do you warm up a Google Workspace inbox by hand?

Manual warmup means using your new inbox for real, everyday email before your mail merge, and making your first bulk sends small and well-chosen. It’s free and it works, but it’s slow and takes daily effort.

Here’s what helps most:

• Use the inbox for real conversations. Email colleagues, customers, partners and suppliers from the new address, and reply to what comes back. Two-way conversations look like a normal person at work, because that’s what they are.
• Send something every day. A little each day builds history faster than one big send a week.
• Ask regular contacts to save your address. Google says email from an address in the recipient’s contacts is less likely to be marked as spam.
• Start your mail merge with your warmest contacts. Send the first batches to people who know you best and are most likely to open and reply, such as existing customers. Save colder contacts for later in the ramp.
• Keep the format steady. Google suggests ramping up again if you change the format of your bulk email, so settle on your template early.

What manual warmup can’t easily do is keep a steady daily rhythm while you’re busy, or show you where your email is landing. That’s where an automated tool helps.

How does automated email warmup work?

An automated warmup tool sends and receives everyday-looking emails between your inbox and a network of other inboxes, a little more each day. Email providers see a normal, active sender and start to trust your address and domain, without you writing anything.

This is what Warmuply does for Google Workspace inboxes on your own domain. You sign in with Google, which takes about a minute, and warmup runs in the background. Nothing changes in how you send: you keep using YAMM, Gmail’s built-in mail merge, GMass, Google Sheets with Apps Script (Google’s tool for automating Sheets and Gmail), or sending by hand. Your contacts never see the warmup emails.

Each day, Warmuply shows you a safe-send number: how many emails your inbox can safely send that day. It also checks your SPF, DKIM and DMARC and explains any problems in plain English, runs placement tests that show whether you land in the inbox, the Promotions tab or spam at Gmail, Outlook and Yahoo, and alerts you the same day if your domain appears on a blacklist (a public list of addresses and domains reported for sending spam).

You can send your mail merge while warmup is running. Just stay at or below that day’s safe-send number.

What can warmup fix, and what can’t it?

Warmup builds trust in your inbox and your domain. It can’t fix who you’re emailing or what your email says, and those two things decide most of what happens next.

What warmup helps with:

• a sending history for a new or quiet inbox
• a daily volume Gmail and Outlook will accept from that inbox today
• SPF, DKIM and DMARC set up correctly
• early warnings, through placement tests and blacklist alerts

What only you control:

• Who you email. People who don’t expect your email are the biggest risk. Bought, scraped or old lists also bring bounces and addresses that no longer exist. Google says not to buy email addresses or send to people who didn’t sign up to hear from you.
• Spam complaints. Every time someone clicks “Report spam”, your reputation drops, and it drops fast. Google asks senders to keep their spam rate below 0.1% (1 in 1,000 emails) and never reach 0.3%. Yahoo also sets 0.3% as its limit. A well-warmed inbox can still end up in spam if enough people report it.
• What your email says and how it looks. Certain patterns make people more likely to report you, and some filters notice them too.

Warmup builds trust in your inbox. It can’t make people want an email they didn’t expect.

Wording matters less than most people think. Filters care more about your reputation, your domain settings, complaints and how people engage with your email, and a single word rarely sends an email to spam on its own. Spammy wording mostly hurts because it makes people hit “Report spam”. Patterns worth avoiding include:

• money and “free” language in capitals, and big promises like “risk-free” or “no catch”
• pushy urgency such as “act now” or “final notice”
• ALL CAPS, lots of exclamation marks, or odd symbols and emoji in the subject line
• fake “Re:” or “Fwd:” subject lines (Google specifically asks senders not to use these unless the email really is a reply or forward)
• lots of links, link shorteners, attachments, or an email that’s just one big image
• the exact same message to everyone, with only the first name changed

Instead, write the way you would to one person, keep to one or two links, skip attachments on your first sends, give people an easy way to opt out, and stop emailing anyone who asks. For more on what really triggers spam filters, read our guide to spam trigger words.

Before your first send, it’s also worth cleaning your list. Remove addresses that bounced before, duplicates, and anyone who hasn’t heard from you in a long time or wouldn’t recognize your name.

How do you know your warmup is working?

You’ll know it’s working when your sends go out without errors, people reply at the rate you’d expect, and your test emails land in the inbox. Watch for these signs as you increase:

Postmaster Tools can show your spam rate and reputation once you’re sending enough email to Gmail users each day. Before then, placement tests are the quickest way to see where you land.

What should you do once your inbox is warmed up?

Keep sending steadily, and keep warmup running. Inboxes that go quiet for weeks and then suddenly send in bulk can lose much of the trust they built.

A few habits keep a warm inbox warm:

• Stay within your safe daily volume. Your number will move with how your emails are received.
• Send in a steady rhythm. A smaller send every day or two beats one huge send a month.
• Grow your list the right way. Add people who asked to hear from you or would clearly welcome your email.
• Keep opting people out. Include a clear way to unsubscribe and remove people who use it. Yahoo asks bulk senders to honor unsubscribe requests within 2 days.
• Meet the bulk sender rules early. Gmail, Yahoo and Outlook.com have extra rules for senders of more than 5,000 emails a day, including having SPF, DKIM and DMARC all in place. One Workspace inbox won’t reach that on its own, but the same standards are worth meeting from day one.

Before you hit send

• Check SPF, DKIM and DMARC are all working. Run the free domain check.
• Plan a slow ramp to your goal instead of one big send. Build your warmup schedule.
• Email people who expect to hear from you, starting with your warmest contacts.
• Read your email as a stranger would: one or two links, no attachments, no fake “Re:”, and an easy way to opt out.

Warmuply warms up your Google Workspace inbox in the background and shows you a safe-send number every day, so you don’t have to guess. Start a free 7-day trial. No credit card needed.