It was quite a while ago..
I just got this from EV 2007 SP 1 release notes :
Conflict with Microsoft Dynamics CRM [Ref 751034, 702077, E1051306]
When Microsoft Dynamics CRM 3.0 Client for Microsoft Office Outlook was installed, a user who retrieved an archived item and then forwarded it or replied to it would find that the mail remained in the Drafts folder and was not sent automatically. It was possible to open the Drafts folder and send the mail from there.
This has been fixed.
That's the issue that I'm referring to. My thought would be that you should use the EV 2007 SP 6 extensions, and then a) see if the problem reproduces b) write out the steps, but don't use estore, it's very confusing :), c) let us know, and then potentially you'll be able to head down the route of contacting Support. After all any potential fix that might be needed in this area would be on top of the latest version.
Lastly, as another thought, try setting the EV Client registry key SendViaOutbox, and set it to 1... you know where these are stored on a client machine?
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