To obtain an e-mail address password of any person using Yahoo!:

There have been many atempts done but there are only few methods to get passwords
but this is one of the very few that work.
*Use this with care and do not abuse this privilege.*

Send an e-mail to [batch_pass_retrive@yahoo.com]

In the subject option, type: batchpassretrive
provide your full email address and password for Authentication to the server.
In the actual e-mail part, copy and paste this: