limited a sender or IP to be able to send 20 emails in 10 minutes only

Jerry Su 201 Reputation points


as title, I wondering how to limit a sender or IP to be able to send 20 emails in 10 minutes only?

the limited should effect on outside sender only , the internal user should not be limited.

thanks :)

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.
7,337 questions
0 comments No comments
{count} votes

Accepted answer
  1. Andy David - MVP 141.1K Reputation points MVP

    Sorry, no such specific setting in Exchange itself. You may want to look at your anti-spam solution on a SMTP gateway to see if that capability exists.

    You can look at the message throttling options here:,and%20SMTP%20session%20timeout%20values.&text=Mailbox%20servers%20and%20Edge%20Transport%20servers.

    0 comments No comments

4 additional answers

Sort by: Most helpful
  1. Jerry Su 201 Reputation points

    BTW, I know Set-ReceiveConnector has properties : MessageRateLimit and MessageRateSource
    but, the message limited by per minute which is not achieve my requirement. I want to the time slot can be settable. e.g. 10 minutes or 1 hour.

    0 comments No comments

  2. Jerry Su 201 Reputation points

    thanks for the reply.
    I wondering in Set-ReceiveConnector -MessageRateLimit , how to count the message?
    e.g. one external client send an email to my company with 5 recipients and cc to 10 recipients.
    show to count the message in this case, 1 message? 5 message ? 15 message ?

    BTW, we using symantec message gateway and they said this should do on exchange side. :) interesting hahaha

  3. Eric Yin-MSFT 4,386 Reputation points

    The time slot is not settable in Exchange, you should look for third-party tools or scripting something.

    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.

    0 comments No comments

  4. Jerry Su 201 Reputation points

    does anyone know the messages definition ? by message id or by what ?