Our order processing system sends out email order confirmations through our mailserver after a customer places and order online. We upgraded to exchange 2010 last week and now all of the subject lines have "Content-Type: text/plainMessage-ID: <d18a0837-f41d-4df9" appended to the subject line.
The subject should be this:
"Order Number W00399330000"
and instead the email is sent with this subject line
"Order Number W00399330000Content-Type: text/plainMessage-ID: <d18a0837-f41d-4df9"
any ideas on how to fix this?