Hi Prasad,


Those emails are being sent to your secret Blogger 'post by email' address, which only you should know.  If someone else has got hold of it, and is using it to post things you don't like (using our or any other service), it'd be best if you change it through your Blogger control panel.


Instructions on how to do that are here:

http://support.google.com/blogger/bin/answer.py?hl=en&answer=41452