I recently setup an Exchange 2007 coexisting in an Exchange 2003 environment. Exchange 03 is currently routing emails from mailboxes that are in 07. However, auto-reply rules seems to stop working. This is the error I get:
Delivery has failed to these recipients or distribution lists:
The e-mail system had a problem processing this message. Microsoft Exchange will not try to redeliver this message for you. Please provide the following diagnostic text to your system administrator.
Diagnostic information for administrators:
Generating server: ex03server.domain.com
#< #5.6.1 smtp;554 5.6.1 Body type not supported by Remote Host> #SMTP#
Does anyone know what this means? I have read that the cause could be the Exchange 03 server isn't supporting 8bitmime, but when i telnet and send an EHLO, it shows up in the list. Any suggestions?