Understanding Google Mail Sending and Sync Limitations
This KB Article References:
Google Mail
This Information is Intended for:
Instructors,
Staff,
Students
Created: 09/06/2012 Last Updated: 08/11/2020
Sending Limits
In order to prevent spam, Google will temporarily disable accounts that send a lot of email in a short time.
It's important to be aware of Google's sending limits:
- Messages per day (2,000)
- Recipients per message (2,000/ 500 external)
- Total recipients per day (10,000)
- External and unique recipients per day (3,000)
For alternatives, consider sending emails through Google Groups, Broadcast Email Messaging, or LISTSERV.
Bandwidth/Sync Limits
Similarly, Google Apps accounts also have limits on bandwidth and sync: "Certain activities that transfer large amounts of data in a short period of time, like synchronizing a Gmail account to a mobile phone or mail client, can cause an account to reach the bandwidth limit." If you're using Google Apps email to send many large files, a better tool that will help you avoid these bandwidth limits is Google Drive sharing.
See Bandwidth limits and Sync limits for more information.