You can try deleting just the partnership (it might have tried to establish using the old one, so you might also go into My Documents and find the sync folder, and rename that too).
Instructions on how to do this can be found at the end of this thread:
http://www.aximsite.com/boards/x50-x...sync-sigh.html
When you reconnect it will create a new partnership, hopefully that will be named properly.
I am not sure that this will fix the e-mail issue.