1 Answer

I know this is really late. Had I seen it when it was posted, I would have found the information for you. If this happens again, this is what toy do: 

Instructions
1
Log in to your Yahoo! Mail account to check the type of account you are using. At the top left corner of your mail home page, you will see that you are either using Yahoo! Mail Classic or All New Yahoo! Mail. 

2
Open a new page and navigate to the Yahoo! Help page to restore lost or delete emails.

3
Read the help page and conditions for recovering emails. Note that recovery of your messages is not guaranteed and that the recovery process is only for emails lost or deleted within a 24-hour period.

4
Click the "please complete this form" link if the conditions noted apply to your case. Be sure to select the link for your type of email account.

5
Provide the information required on the restore form. This information includes your name and Yahoo! ID information about the message lost or deleted and your contact information.

6
Click "Submit" once the form is complete.

7
Wait for a response from a Yahoo! technical support agent.

eHow http://www.ehow.com/how_6216416_recover-lost-yahoo-email.html#ixzz2Tlhknzd7