My Google account stopped generating tickets within Zendesk and now I received this error message: You've reached your Google sending limit. What does this error message mean?
Google has a daily sending limit of 500 notifications a day for Gmail and 2000 a day for Google Apps. This mechanism is at the control of Google's servers and is not something that is controlled by Zendesk.
As a proactive measure, to help prevent you from reaching your rate limit for Google, Zendesk restricts your use at 1500 notifications when you have the Gmail connector enabled, to prevent your Gsuite account from being completely disabled.
To avoid this error you can forgo the use of the Gmail connector and set up a forwarding rule instead. Optionally, you can edit or create an SPF record to verify that Zendesk can send email on behalf of your email server.
To find the reason for reaching the Google sending limit, look at your Gsuite Activity dashboard to see the total amount of emails sent. For more information on this, see this article from Google's Help Center: User reports: Accounts.
For any discrepancies or inaccuracies, reach out to Gsuite Support for further guidance on why this limit was reached.