Although I am against wasting your time attempting to make your initial business introduction by email, if you insist on doing so, then try to make that email as professional as possible.
Professional correspondence, whether by mail, fax or email is your key to success or failure in a matter of seconds.
I have posted a very good example of a business introduction email that provides pricing and product information on our web site. I have also critiqued it's positive and negative points to help you take this example and improve upon it.
Hope this helps your business: http://www.importexporthelp.com/business-strategies/sample-business-quote.htm