I have a problem with my Exchange 2000 server, receiving messages from Exim mail servers. I can't receive messages from Exim 3.32 and 3.35 servers (maybe other versions, but Exim is the only one for which this has occurred). The NDR received by the sender contains a 500 5.3.3 Unrecognized command error. Advice I have received from elsewhere suggests that the problem may be in pipelining, so I am trying to find out how to disable pipelining on the Exchange server to test that theory. Any ideas on how I can do that?
Cheers, Joel Gaskell MGR Consulting List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm