Filter Incoming Massive Email Storm

Jon Mercer 971 Reputation points

This is a curiosity question; we have a fix for the base issue.

Is there a way to set a mail flow rule that has a threshold that says if after a certain number of emails to the same mailbox are received in say 2 seconds, to block any new emails to that mailbox for a certain amount of time, and then would allow emails to that address to route as they normally would?

We have a mass email alert we send out on occasion, and usually get a couple hundred OOF messages. The issue is that the email address being sent from (this was fixed by setting up a no-reply@ mailbox) creates a service request for any emails sent to it.

Microsoft 365
Microsoft 365
Formerly Office 365, is a line of subscription services offered by Microsoft which adds to and includes the Microsoft Office product line.
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Microsoft Exchange Online
Microsoft Exchange Online Management
Microsoft Exchange Online Management
Microsoft Exchange Online: A Microsoft email and calendaring hosted service.Management: The act or process of organizing, handling, directing or controlling something.
4,320 questions
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Accepted answer
  1. Dezhi Li-MSFT 780 Reputation points

    Hi Jon Mercer,

    Unfortunately, currently exchange online can't implement your needs, you can submit your ideas at the link below and let your colleagues vote for it. If your idea is very popular this can give Microsoft a better understanding of your needs. Thank you for your understanding.

    Best Regards,


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