DeliverabilityPublished 8 min read
Gmail Sending Limits for Cold Email in 2026
A free Gmail account can send to about 500 recipients a day. A Google Workspace account can send 2,000 messages a day, but only 3,000 of its recipients a day may sit outside your own domain, and only 2,000 of its unique recipients may be external. Hit any of these and Gmail blocks sending for up to 24 hours. For cold email, treat them as the point where Google stops you, not as a target: a mailbox that sends hundreds of cold emails a day will land in spam long before it reaches the cap.
Below are the exact numbers from Google's help pages, what happens when you hit one, the separate "bulk sender" rules, how Microsoft 365 compares, and the daily number we'd actually send.
What are the Gmail sending limits in 2026?
These are the limits Google publishes for personal Gmail and for each Google Workspace user. Google's Workspace page was last updated on 13 October 2026; we checked both pages on 20 October 2026.
| Limit | Free Gmail | Google Workspace |
|---|---|---|
| Messages per day | 500 | 2,000 (500 on a trial account) |
| Messages per day with mail merge | n/a | 1,500 |
| Total recipients per day | 500 | 10,000 |
| Recipients outside your domain per day | n/a | 3,000 |
| Unique recipients per day | n/a | 3,000, of which 2,000 external (500 external on a trial) |
| Recipients in one message | 500 | 2,000 in To, Cc and Bcc, at most 500 external |
| Recipients in one message sent over SMTP from an IMAP or POP client | n/a | 100 |
| Recipients in one message sent through the Gmail API | n/a | 500 |
A few details matter more than the headline numbers:
- The day is rolling. Google counts the last 24 hours, not a calendar day. Sending 400 emails at 09:00 means those 400 count until 09:00 tomorrow.
- Every recipient counts. One email to 10 people is 10 recipients against the recipient limits.
- External recipients run out first. The 3,000 external and 2,000 unique external limits sit well below 10,000 total recipients. Cold email is all external, so for outreach the 2,000 messages a day is the limit you'd reach.
- Trial accounts are tighter. A new Workspace account on its trial gets 500 messages and 500 unique external recipients a day.
What happens when you hit a Gmail sending limit?
Gmail stops sending from that account, and you see errors such as "You have reached a limit for sending mail" or "You exceeded the maximum recipients". Receiving mail and the rest of Google still work. On free Gmail, Google says sending usually comes back within 1 to 24 hours; on Workspace, sending can be blocked for up to 24 hours, and the counters keep rolling after that.
For cold email the block itself is the smaller problem. A sending tool that keeps trying all day piles up errors, the campaign stalls in the middle of a sequence, and a mailbox that hit the cap almost always did something else wrong first: sent too many emails too fast, or to a list full of bad addresses. Google also says bounced messages can block sending: if many of your emails go to addresses that don't exist, you may have to wait 24 hours.
Is there an hourly limit in Gmail?
Google doesn't publish one for Gmail or Workspace. Sending in bursts still looks like a machine, though, and spam filters notice. Spread a mailbox's emails across the working day with a few minutes between them.
Microsoft 365 is different: it publishes a limit of 30 messages a minute per mailbox (more on Microsoft below).
Gmail's bulk sender rules are a different limit
Separate from the sending caps, Gmail has rules for "bulk senders": anyone who sends close to 5,000 messages to personal Gmail accounts within 24 hours, counted for the whole primary domain, not per mailbox. Once a domain counts as a bulk sender, it stays one. Bulk senders need to:
- authenticate with SPF, DKIM and DMARC (a DMARC policy of
p=noneis accepted), with the From domain aligned, - keep the spam rate users report in Postmaster Tools under 0.1% and never reach 0.3%,
- offer one-click unsubscribe in marketing and promotional mail, and honour it within 2 days.
Google started ramping up enforcement on traffic that doesn't follow these rules in November 2025, with temporary or permanent rejections. Google writes these rules for bulk mail to personal accounts, not for B2B outreach specifically, but the authentication part applies to everyone in practice: our free domain check shows in two seconds whether your SPF, DKIM and DMARC records are in place.
The detail people miss: 5,000 a day is counted per domain. Twenty mailboxes on one domain sending 250 each is 5,000 from that domain.
How many cold emails should you send per Gmail account per day?
Far fewer than the limit. Google's caps are about abuse of the service. What decides whether you reach the inbox is your reputation with spam filters, and that drops fast when a new mailbox sends a lot of email to strangers.
Our defaults in Ballast, which you can change per mailbox:
- 30 emails a day per mailbox once it's fully ramped. The app warns you above 50.
- A ramp-up: a new mailbox starts at 5 a day and adds 2 a day, so it reaches 30 in about two weeks.
- 4 to 10 minutes between emails, chosen at random, and only inside the lead's working hours in their own time zone.
Thirty is a choice, not a rule from Google. It leaves room for replies, follow-ups and the person who actually uses the mailbox, and it means one bad day costs you a few dozen emails, not a domain.
Unlimited mailboxes is not unlimited sending: to send more, add mailboxes and domains, don't push each mailbox harder. The math is plain division:
| Cold emails per day you want | Mailboxes at 30 a day | Domains at 3 mailboxes each |
|---|---|---|
| 300 | 10 | 4 |
| 1,000 | 34 | 12 |
| 3,000 | 100 | 34 |
Keep the bulk sender rule in mind as you add mailboxes: what counts there is the total per domain.
Do the limits differ when you send through a cold email tool?
The daily limits are the same however you send: the Gmail web app, an IMAP/SMTP connection from a tool, or the Gmail API. Only the recipients per message differ (100 over SMTP from an IMAP client, 500 through the API), which doesn't matter for cold email, where each email goes to one person.
What a tool changes is pacing. It can hold a mailbox under a daily number, spread sends across the day and stop when bounces climb, which is how you stay well under Google's limits instead of finding them.
How do Microsoft 365 and Outlook limits compare?
Microsoft publishes these limits for each Exchange Online mailbox (page updated 19 October 2026):
| Limit | Microsoft 365 |
|---|---|
| Recipients per day | 10,000 |
| Messages per minute | 30 |
| Recipients in one message | Up to 1,000 (the admin can lower it) |
| External recipients per day, whole tenant | Set by the number of licenses; 5,000 on a trial |
| External recipients per day from an onmicrosoft.com address | 100 for the whole organisation |
Microsoft also asks domains that send 5,000 or more emails a day to Outlook.com, Hotmail and Live addresses for SPF, DKIM and DMARC, and rejects mail that fails with the error 550 5.7.515. The same advice holds: the published limit is far above what a cold mailbox should send.
Can you raise the Gmail sending limit?
No. Google doesn't sell higher limits for Gmail or Workspace, and it says the limits can change without notice. If you need more volume, add mailboxes, ideally on a few separate sending domains, so one domain's bad week doesn't stop everything.
When this advice doesn't apply
If you send newsletters or product email to people who signed up, these numbers aren't your limits to work around: use an email service built for bulk sending, with its own IPs and unsubscribe handling. Cold email from Gmail and Workspace mailboxes is for one-to-one outreach, at a pace a person could plausibly keep.
How we checked these numbers
- Gmail sending limits, Google Help, checked 20 October 2026.
- Gmail sending limits in Google Workspace, last updated 13 October 2026, checked 20 October 2026.
- Email sender guidelines FAQ for the bulk sender rules, checked 16 October 2026.
- Exchange Online limits, Microsoft Learn, updated 19 October 2026, checked 20 October 2026.
We'll update this page when Google or Microsoft change their numbers.
FAQ
How many emails can I send per day with Gmail?
500 a day with a free Gmail account and 2,000 a day per user with Google Workspace (500 on a Workspace trial). Workspace also caps external recipients at 3,000 a day and unique external recipients at 2,000 a day.
How long does a Gmail sending limit block last?
Up to 24 hours. Google counts a rolling 24-hour window, so sending comes back as your oldest emails fall out of it, usually within 1 to 24 hours on free Gmail.
Is 2,000 emails a day per Google Workspace user safe for cold email?
No. It's the point where Google blocks you, not a safe volume. Cold mailboxes that send hundreds of emails a day to strangers get filtered to spam. Thirty a day per mailbox, after a ramp-up, is the default we use.
Does Gmail have a limit per hour?
Google doesn't publish an hourly limit for Gmail or Workspace. Spread emails across the day anyway: bursts look automated. Microsoft 365 does publish one, 30 messages a minute per mailbox.
Does the 5,000 a day bulk sender rule apply per mailbox?
No. Gmail counts it per primary domain, across every mailbox that sends from it, and only for messages to personal Gmail accounts.