I have a laptop running windows 7 and MSO 2010 and using a VODACOM 3g card to pop off emails. Internet access is fast and working perfectly. The only problem is when sending emails, emails immediately gets sent to outbox and hangs for 2 minutes before sending to relevant email address.
This laptop is not part of a domain and has never been connected to exchange server. However the user does have an existing exchange mail box in exchange server.
I also have identical symptoms on 2 laptops that are in the domain with exchange accounts as well as pop accounts.