Subject – _______________________(Mention the purpose)
I am Mr. ____(Your name) and kindly note that this letter is to make an entry into your firm for the post of _____(Mention the post) in your company____(Mention the name of company) for which you have given advertisement in your web site.
In fact with over a decade long experience and exposure in the field of marketing will be an added advantage for me to work in your firm at this senior most level.
Hope you will get back to me very early
Name and signature.