Just FORWARD the mentioned nonsense email (post#1) to:
abuse@yahoo.com
Then delete it.
If enough people do so, big-yahoo will take care of
this fake 'kapatamara' pos at their own source.
No, she/he should not know your email address, yet?
(unless you already replied.)
No, no, DO NOT REPLY to the original sender
- else you will be getting more of the same crap for the rest of you life...