I have a client that uses a utility to email a subscribtion email to over 20k members. We have configured Exchange 2007 to allow relay from their non secure/vpn IP addres. The process works fine except that the connection is disconected after 10 minutes. I need to know where in Exchange 2007 this 10 minute non authenticated connection time out can be changed. The process typically takes 2 hours.
Please - this is a workaround for larger issues that we are helping the client with (vpn, firewall, etc). So we can not use other solutions, ideas or workarounds for this issue.