I have a free Google Apps account (not Google Apps for Business) which I access using Outlook 2010 via IMAP. It's working great with one exception. When I send an email using Outlook, I end up with two copies of the email in the Sent Mail folder. One seems to be placed there immediately upon sending (by Outlook, I assume) and several seconds later, the other copy appears. The recipient of the email receives only a single copy of the email.
The duplicates show up when I view the account via the Gmail web interface, or Outlook or even via iPhone (configured to access as an Exchange type account).
Also, I do have Google Sync enabled for the domain. (I thought this was necessary to be able to read/send mail via the iPhone). Is this part of the problem? What is Google Sync doing?
Thanks for any suggestions to resolve this duplicates issue.