或者语法高手给检查下我这封开发信有哪些错误?

或者语法高手给检查下我这封开发信有哪些错误?
Dear Madam or sir
Your esteemed name and address has been recommended to us by ……,as being a very potential importer in your country,we take the opportunity to write you with the earnest desire of having the opportunity to enter into business relationship with you.
We are a corporation specializing in manufacture and export of chemical raw material.In order to acquaint you with our business line,we enclosed a copy of our product list covering the main items suppliable at present.
If we can be of any further help,please kindly let us know by returning mails,customer inquiries are always meeting by our careful attention.
Sincerely,
Arthur