where do my sent Yahoo e-mails go? They are no in"sent"?

The default is to save all sent email in the Sent mail folder. Changes in your account could mean your account was hacked and account information changed. See the articles below for more information.

How to tell if your account was hacked - http://help.yahoo.com/kb/index?page=content&y=PROD...

If you think your account was hacked, the first thing to do is to immediately change your password - https://edit.yahoo.com/forgotroot/

If you're unable to change your password, open the first link and click the "Contact Customer Care" link under the Quick Links section to the right of your screen. This should open the "How can we help you?" form.

"Select your Product" select "Yahoo! Account"

"Select your category" select "Hacked Accounts"

"Select your sub-category" select "unable to verify my secret question"

"Briefly tell us how we can help" enter 'secret question was changed"

Scroll down until you see an envelope that says "Email a Support Agent".

Click on the envelope and fill out the form.

You can also select "Talk to our support team by phone"

If you use your Yahoo password at other sites you will need to change the password for those sites as well. I recommend using a password manager like Keepass or LastPass to create strong unique passwords for the sites you visit. You can also save notes like your secret questions and answers to the password entries. LastPass can automatically log you in to any web site you have stored in its database.

Here's how to check your account activity - http://help.yahoo.com/kb/index?page=content&id=SLN...

Explanation of Login Activity - What Access Types and Events are - http://help.yahoo.com/kb/index?page=content&id=SLN...

To learn more about protecting yourself online - http://security.yahoo.com/

Make sure your antivirus is up-to-date and run a full virus scan on a regular basis.

Safeguarding your Yahoo! Account - http://help.yahoo.com/kb/index?page=content&id=SLN...

What to check when securing an account that has recently been compromised - http://help.yahoo.com/kb/index?page=content&y=PROD...

Here's a link on restoring your emails, contacts, and other settings - http://help.yahoo.com/kb/index?page=content&y=PROD...