Hi,
I'm creating a receive connector and I would like to rate limit inbound messages on this receive connector on a per user basis. Based on the Set-ReceiveConnector KB article (http://technet.microsoft.com/en-us/library/bb125140.aspx ), I should be able to do this by setting MessageRateSource to "User".
According to this KB article, when MessageRateSource is set to "User", "The message submission rate is calculated for sending users (specified with the MAIL FROM SMTP command)."
However when I configure the receive connector to use MessageRateSource as "User", it appears that no rate limiting at all is being applied. The rate limit on the connector is being applied as expected if the MessageRateSource is IPAddress.
To test the rate limiting I've written a PowerShell script that uses the Send-MailMessage cmdlet to submit a configurable number of test emails. All of the emails are sent with the same "from" address and from the same host. When MessageRateSource is set to "User", I can exceed the configured rate limit without any errors. When MessageRateSource is set to "IPAddress", I get the following error when I exceed the rate limit.
Send-MailMessage : Service not available, closing transmission channel. The server response was: 4.4.2 Message submissi on rate for this client has exceeded the configured limit
So, is there something I'm missing when setting MessageRateSource to "User"? I've tried google searches etc but there appears to be very little information on the MessageRateSource parameter other than the KB article linked above. I've investigated throttling policies and they tend to focus on SMTP connection rates. I want to limit the message rate on a per user basis.
Thanks,
Aaron