Hi,
I have an yahoo email account that was inactive for awhile.  After I
logged back in, all the emails were gone!!!!  How can I contact yahoo
and does anyone has similiar experience and was successful in getting
their emails back? I will give handsome tips to those who can provide
a satisfying answer.  thank you

I very much doubt that you will be able to retrieve these emails. Here
is Yahoo's statement on the deletion of dormant accounts:

"Dormant accounts are de-activated at the end of four months. A
dormant account is one which has not been logged in to over a
four-month period, regardless of whether or not email has been
received in the account during that time.

Once an account has been de-activated, we cannot retrieve any of the
information that was formerly stored in it."

http://help.yahoo.com/help/uk/mail/access/access-04.html