Our Exchange 2010 Edge is still getting this error message, and reject the message 421 4.3.2 System not accepting network messages We have a few receive connector only one receive connector got this error. I try to review all the log Protocol; connectivity log still no idea it just show this error I already change the MaxInboundConnection and MaxInboundConnectionPerSource to 5000 and 500 on the Receive Connector How can i overcome this issue. it make me a lot of trouble

Hi, Does the edge server reject all the Internet messages? If yes, please try to recreate the accepted domains. http://technet.microsoft.com/en-us/library/bb124423.aspx