What this message means
This banner indicates that Google is throttling or temporarily restricting sending activity from the connected Gmail/Google Workspace mailbox. In practice, this is most commonly triggered when the mailbox approaches or exceeds Gmail sending quotas, or when multiple tools/services are sending mail (or accessing Gmail) in parallel. Google Workspace Gmail sending limits are documented by Google (for example, 1000-2000 messages/day per user for most paid Workspace accounts, with additional recipient-based limits).
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Step 1 — If this is Google Workspace and you have admin access: review connected services (critical)
If the mailbox is part of a Google Workspace domain and you (or your IT admin) have admin access, verify how many apps/services are connected and specifically which ones have Access to Gmail.
Use Google’s “Manage connections between your Google Account and third parties” flow and click View connections.
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Provide this link to the Workspace admin:
https://support.google.com/accounts/answer/13533235?hl=en#zippy=%2Csign-in-with-google
What to do in the connections list
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Go to Sign in with Google connections, then review each app/service.
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Filter or look for entries that show Access to Gmail.
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Remove access for anything unused, duplicated, or unknown.
We regularly see Google restrict sending when multiple services are connected and attempting to send or access Gmail simultaneously. Reducing the number of Gmail-authorized services can materially reduce throttling risk (and is also a security best practice).
Step 2. Are you sending marketing emails from the same address?
If yes, stop sending marketing from the same mailbox (or separate marketing vs transactional/support sending).
3) Do you have CSAT enabled for email?
If yes, temporarily disable to test whether rate-limiting stops, or move sending off Gmail (below).
Recommended solution (most reliable at scale)
Move sending to Commslayer-managed sending (through our servers). This requires setup on both sides, but it’s the most reliable way to avoid Google rate limits at your volume—especially if you are near ~1,000–2,000 emails/day and/or combining support + marketing + CSAT from the same domain/address.