Why would I have duplicate Sent mail messages

Question

I use Mail to retrieve my Outlook.com mail and every message I send shows up twice in the Sent mailbox for this account.  It hasn't always done this, so I'm not sure what got changed?

Answer 1

Dennis,
Who replaced the HD? You or someone else.
Based on your comment, it seems reasonable to think maybe the smaller library that was last modified the same month as the HD replacement was copied to the new HD and contains whatever you had in the library at that time.
I would do the following:
1 - Select 'Photos' icon in the upper ('Library') section of the Library Inspector (of smaller library)
2 - Set view to 'List View'
3 - Write down number of items displayed (listed at bottom of browser pane by default) and write down starting and ending image names
4 - Switch to larger library and set the selection and view the same as in #1 & #2 above respectively
5 - See if the  number of items and starting / ending image names match
6 - If not, you might think about adding the smaller library to the larger library (after backing up both)
Note - this would be considered one of the 'Merging Libraries' procedures, bottom item at linked page below:
http://documentation.apple.com/en/aperture/usermanual/#chapter=3%26section=3
If the number of items and starting / ending image names in step #6 match what you wrote down in step #3, then you could simply back up the smaller library for safe-keeping and delete it if you wish.
Basically, you would need to determine whether the smaller library is already contained in the larger library, or whether it is in addition to the larger library due to HD failure and replacement. It would be typical for a technician to at least copy the old personal files to the new HD (although he / she should have told you if that was the case).
Message was edited by: CorkyO2 to add '(of smaller library)' to step #1.