Sequences let you automate outreach to hundreds of contacts, but sending too many emails too quickly can trigger Gmail's sending rate limits. Gmail may flag your messages as spam and stop delivering them. To prevent this, Mixmax uses a spacing algorithm that makes Gmail treat your messages as if they were sent manually.
Since Mixmax sends messages through your Gmail account, it's subject to any limits set by Google — including rate-limiting. Google monitors both the total number of messages you send in 24 hours and the rate at which you send them. These limits apply to everything you send from your Google account, including one-off emails, not just Sequence emails. See Gmail's specific account limits for details.
How Mixmax protects your deliverability
Mixmax has safeguards to help prevent rate-limiting. We send messages individually and space them out over time based on your workspace's daily send limit. You can also distribute volume across multiple Gmail accounts by sharing your Sequence with a teammate.
Factors that affect your sending limits
Bounce rate: If you're sending to malformed or invalid email addresses, you're much more likely to be rate-limited.
Spam reports: Each time a recipient clicks Mark as spam in Gmail, Google penalizes you by reducing your daily send quota by ~100 emails.
Sending history: Your prior sending behavior affects the limit Google sets for your account. Learn more about optimizing email deliverability.
New and trial accounts: Google Workspace trial accounts can send up to 500 emails per day, and that limit doesn't increase during the trial. A newly created account also has little sending history, so Google may limit it sooner.
Sending velocity: Google Workspace users can send up to 2,000 emails per day, but cannot send them all at once. Space them out over time.
See Gmail sending limits in Google Workspace for more from Google.
If you routinely send emails to more than 10,000 people at once for marketing automation, we recommend using a dedicated marketing automation tool. Mixmax is optimized for sending individual, personalized messages at scale from Gmail — not for sending thousands of emails each day.
What happens when you reach your Gmail sending limit
When your Google account reaches its sending limit, Google stops it from sending new emails for up to 24 hours. Google counts your emails over a rolling 24-hour period, not a calendar day.
While the limit is in place:
One-off emails aren't delivered, and Mixmax emails you a notification explaining that your Google account reached its sending limit. Learn what to do in How does Mixmax handle bounces?
Sequence emails are retried for up to 12 hours. If the limit lasts longer, those recipients are marked as failed, and you can resend to them later. See How to resend undelivered emails.
Looking for your plan's monthly recipients limit? That's a separate setting. See Sequence recipients limit for the number of recipients you can enroll in Sequences each month based on your plan.