Share via

Exchange Online Message rate limit work-around

Anonymous
2020-01-29T23:05:52+00:00

The posted message rate limit for MS Exchange Online is 30 messages/minute.

I have a key user in our organization who manages a group of 45 or so volunteers. She frequently needs to send an email to that group in order to notify them of events, etc. I'd rather not have to introduce her to an external solution like mail chimp for such a simple thing.

Is there a way to automatically throttle the delivery of an email to a large group as this? Breaking it up in to several chunks of users seems so rock and quill...

For example, is this limit also applied to a SharePoint flow or Power Automate workflow? I might be able to configure a workflow to send out a notification email with a link to a message posted. Just thinking...

(Found an example at https://powerusers.microsoft.com/t5/Building-Flows/sending-emails-to-a-SharePoint-contacts-list/td-p/118559, but there is no discussion of the interaction with the message rate limit.)

Nikko

Microsoft 365 and Office | Subscription, account, billing | For home | Windows

Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.

0 comments

Answer accepted by question author

  1. Anonymous
    2020-01-30T04:48:28+00:00

    Hi Nikko,

    Welcome to post in community.

    If a user submits messages at a rate that exceeds the limit via SMTP client submission, the messages will be rejected and the client will need to retry. And this is called Message Rate limit, for your situation, you can try to set up SMTP relay using devices and business applications to send emails. 

    Office 365 SMTP relay has higher sending limits than SMTP client submission; senders are not bound by the 30 messages per minute or 10,000 recipients per day limits. You can refer to this article to get detailed instructions: How to set up a multifunction device or application to send email using Office 365

    For Share-Point flow and Power Automate workflow, I guess that the limit is quite different since they belong to different plans. I'm not specail on these filed, you can also create a new thread on related category to ask for answer. Our engineers will come to give your more professional explaination.

    Feel free to post back if you have any other concern on Message Rate limit.

    Best,

    Shawn

    1 person found this answer helpful.
    0 comments

0 additional answers

Sort by: Most helpful
Most helpful Newest Oldest