Since December 22nd, we’ve been experiencing a critical issue across all our AppSheet applications: scheduled email workflows (bots) are failing to send emails. The Audit Log shows the following warning:
“Warning: Email failed to be sent. This is due to hitting a rate-limit quota or invalid recipients.”
We are on the Enterprise Plus plan, which provides:
25,000 email recipients per hour
50,000 email recipients per day
After thorough internal checks:
There are no invalid recipients in the bot configurations.
The bots send emails to fewer than 3,000 recipients in total.
There have been no recent changes to the bots.
The same issue is occurring across multiple apps, all of which have worked reliably for the past several years.
A particularly frustrating aspect is that the automation steps show as “Complete” in the Monitor tab—even when the email has clearly failed to send. This is misleading and makes it harder to detect and troubleshoot the problem in real time.
We rely heavily on AppSheet for field operations, with over 2,000 active users using the apps daily. This unexpected disruption is significantly impacting our workflows.
I have already raised a support ticket:
Case ID: 6-3946000040106
I would really appreciate help from the community or AppSheet team:
Has anyone else encountered similar email failures recently, despite staying well within quota limits?
Is there any way to track actual email usage (per hour/per day) at the app or account level?
Any insights, workarounds, or official updates would be greatly appreciated.
AppSheet commonly makes unannounced changes, and seldom even acknowledges them publicly (i.e., here) even after numerous complaints. As you’ve already done, contacting Support should be your first step, even though Support is horrible.
I apologize for the inconvenience caused. The ticket 6-3946000040106 has been created for this issue, I am following up with the support team and keep you all posted.
I got a notice from the support team that apparently the issue is caused by invalid recipients rather than a rate-limiting issue.
I found that if a bot encounters an invalid email address, the email will not be delivered to any of the intended recipients, and the bot task will fail or log an error.
This explanation isn’t valid. We have already verified this across all our apps, and no changes were made on our end. The automations have been running reliably for the last couple of years without any issues.
When an automation fails due to invalid recipients, the Automation Monitor clearly shows an error and explicitly identifies the invalid recipient. In this case, the automation completed successfully, and the warning appeared only within the step details, which indicates a design flaw rather than a configuration issue.
Additionally, this issue affected all our apps at the same time. We send thousands of emails every day, and it is not plausible for all of them to fail simultaneously due to invalid recipients.
This clearly points to an internal change or bug on the AppSheet side, which now appears to have been resolved.
Error we are seeing in AppSheet editor is false statement. You and your support teams are just varified that expectation was true…
Problems with us is you and your support team are not really undrestand the real problems are and reporting us back with the false statement to bury our claims.
Happy 2026! I just looked again at the notes support team added and they have concluded it is a failure on AppSheet side. Now, based on this post, the email automation should be working fine now. Please let me know if that is not the case.
I will request for a Root Cause Analysis and come back to you.
Case ID: 6-3946000040106