Can i send Bulk emails around 150000 using smtp relay in office 365, is there any limitation

pavan kumar 371 Reputation points
2021-03-09T15:59:42.46+00:00

Hi,

Is there any limitation in sending an emails externally using office 365 smtp relay, we have an application that send emails to our external members with OTP, Transaction emails for day to day activity.

we are in a phase of migrating to office 365 soon, my manager likes to know is there any sending limit in office 365 per day using a smtp relay.

Thanks
Pavan.

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.
3,375 questions
Exchange Server Management
Exchange Server Management
Exchange Server: A family of Microsoft client/server messaging and collaboration software.Management: The act or process of organizing, handling, directing or controlling something.
6,521 questions
Microsoft Exchange Hybrid Management
Microsoft Exchange Hybrid Management
Microsoft Exchange: Microsoft messaging and collaboration software.Hybrid Management: Organizing, handling, directing or controlling hybrid deployments.
1,417 questions
0 comments
Accepted answer
  1. Robert Sparnaaij [MVP] 1,811 Reputation points MVP
    2021-03-09T17:03:10.793+00:00

    Yes there is a limit and no, your scenario is not allowed.

    See; Exchange Online limits - Sending limits

    It even contains an additional not about this;

    Exchange Online customers who need to send legitimate bulk commercial email (for example, customer newsletters) should use third-party providers that specialize in these services.

    3 people found this answer helpful.

1 additional answer

Sort by: Most helpful
Most helpful Newest Oldest
  1. Yuki Sun-MSFT 29,706 Reputation points
    2021-03-10T05:04:30.583+00:00

    Hi @pavan kumar ,

    Microsoft 365 has a Recipient rate limit of 10000 recipients per day which cannot be customized. So agree with Robert that you would need to look for some third party solutions for your scenario. For more information about the sending limits in Exchange Online, hopefully you can find the official link shared above by Robert helpful.

    By the way, if you found his post useful, it would be appreciated that you can accept his post as answer to close this up. This can make answer searching easier in this forum. If you have further concern on this, feel free to post back. Thanks!

    If an Answer is helpful, please click "Accept Answer" and upvote it.
    Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

    1 person found this answer helpful.
    0 comments