Hello Everyone.

I have default MessageRateLimit for Client Frontent and Client Proxy connectors (5 message per minute per user). It's ok, but there is an account which I want to give a permission to send more than 5 msg/min. Is there some kind of user-level exclusion list for message rate limitation? 

Hi ,

As per my understanding receive connectors are server specific so we cannot able to provide user based exclusions on the receive connectors in exchange.

Hello Everyone.

I have default MessageRateLimit for Client Frontent and Client Proxy connectors (5 message per minute per user). It's ok, but there is an account which I want to give a permission to send more than 5 msg/min. Is there some kind of user-level exclusion list for message rate limitation? 

If the user is authenticating to the Exchange Server, you can probably apply a specific throttling policy

https://technet.microsoft.com/en-us/library/Dd298094(v=EXCHG.150).aspx

The MessageRateLimit parameter specifies the number of messages per minute that can be submitted to transport. For messages submitted through the Mailbox server role (using Microsoft Outlook, Microsoft Office Outlook Web App, Exchange ActiveSync, or Exchange Web Services), this results in the deferral of messages until the quota for the user is available. Specifically, messages appear in the Outbox or Drafts folder for longer periods of time when users submit messages at a rate greater than the MessageRateLimit parameter.

For POP or IMAP clients submitting messages directly to transport using SMTP, clients receive a transient error if they submit at a rate that exceeds the MessageRateLimit parameter. Exchange attempts to connect and send the messages at a later time.

The only way i could see this possibly working is if you create a new receive connector and then setup a specific machine (based on the IP address). From there you can set your MessageRateLimt on the new receive connector for this specific machine they are sending from.

Aside from that, there is no other way that i know of.

See link below for details about MessageRateLimit

https://technet.microsoft.com/en-us/library/hh529935%28v=exchg.141%29.aspx?f=255&MSPPError=-2147217396

Will.