It is some couple of days which I received spam mail (Such as advertisement of drugs and ..) which in all of them sender is from my YAHOO! personal mail address. what shall I do?
The return address is forged. E-mail is just a file - you can forge anything in it that you want. They regularly pick one of the addresses in their list that they spam to and put it down as the return address.
Defamation of character, if you ask me. You could try suing them.
