Step 12
On the Internet E-mail Settings window, click on the Sent Items tab. Select Save sent items in the following folder on the server:. Click on More Folders...On the IMAP Folders window click the Query button. If you have used webmail before on this account, you will see a folder called SentMail. If so, click on this and click on OK.
If there is no SentMail folder listed, click on Cancel and then on New Folder.... In the Create Folder window enter SentMail (case-sensitive) and click OK.