Login and then click on Folders option at the left side
Then in the new page click on sent mail option which appears in the middle of the page
If nothing is there before clicking sent mail option click on "sent mail settings" option and enable "Save a copy of all outgoing emails automatically in your Sent Mail folder."
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Sent mails are not automaticaaly saved in the sent mail folder. To change the settings, go to my settings on the left side. Click on the sent mail option in my settings. And then click on the "Save a copy of all outgoing emails automatically in your Sent Mail folder"....... now your sent mails will be automatically saved to the sent mail folder... enjoy