Invoke shell script on receiving mail

[raj sourabh]

Hi All,

I am trying to make a script that does the following:

* Checks any new mail on my gmail/yahoo account
* If any new messages - invoke a script on local system ( script will
generate a number)
* respond to the mail with this number

I have tried many things to achieve this did not succeed. If anyone has
done anything of this kind, Please share your ideas.

Thanks in advance.

Regards
Raj