How to restore emails from outlook to yahoo server?

I lost all the emails in my inbox after syncing with outlook. How can I restore them?

• I didn't know that the default behavior of outlook is to delete the copy on the mail server. After transferring all emails from my yahoo account to outlook, I discovered that my yahoo inbox was empty. I'd like to restore all the emails that were in my inbox before the sync. I do have a mail plus account. Please advise how I can restore all my emails. Thanks a lot! Keh-shin

• Answer:

  if you have a PC, you can go into the user settings, and there is an option to restore you computer back to the settings of a previous date. just click the date, and i think all of your emails will be back.