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

Question

halo,

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 :)

Answer 1

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:

https://learn.microsoft.com/en-us/exchange/mail-flow/message-rate-limits?view=exchserver-2019#:~:text=Message%20throttling%20refers%20to%20a,and%20SMTP%20session%20timeout%20values.&text=Mailbox%20servers%20and%20Edge%20Transport%20servers.

Answer 2

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.

Answer 3

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 ?
thanks!

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

Answer 4

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.

Answer 5

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