check whether an Account is existed or not Dynamic CRM

Question

Hi All,

 

   I have a requirement like ,when a new e-mail comes in to the crm-mail box(ex. [email protected]), I have to check whether an Account is existed or not for the sender mail id. How can i achive this one.. can u please give a response asap..

Thanks in Advance

Venkatesh Ekkaluri.

[email protected]