英文商务书信的基本格式要给外国客户发E-MAIL该怎么写才很正式呢?最好有范本格式~

From:X X X
To:X X X
Date:X X X
Subject（主题）:
Dear Ms.Cunningham:
You and your company have been recommended to us by Charles Lewis of East Asia Building Material Supplies.Charles mentioned that your company provides high quality goods and services at a reasonable cost,and I am writing to inquire about establishing business cooperation between you and my company,China Merchandise Company.
China Merchandise Company is one of the largest international exporters of Chinese goods.We have clients throughout the world,especially in the United States.Chinese ornamental merchandise represents one of our most popular products.As such,we would appreciate it if you could send us your latest sales catalog for our review.We believe that establishing business cooperation with Ornamental Decorations and Supplies will be mutually beneficial for your company and ours.
I look forward to receiving your catalog and doing business with you in the future.
Sincerely yours,
Mai Yang
Manager
常用表达方式
说明如何了解对方,请求提供产品信息：
We recently learned about your company through our market research,and are writing to request a catalogue and price-list for merchandise available from your store.
介绍自己的实力：
We are a Chinese export company with clients around the world.
请求实质性磋商：
I will contact you within a week to schedule an appointment.
这个只是个例子
如果你需要对方快速回信你可以在信的末尾写上I'm looking forward to hearing from you
需要注意的是总体格式一般都是靠左顶格写,如上,无需和中文书信一样空两格,这是目前最流行的格式

其实EMail的话就比较简洁了。
Dear XXXX,
《内容》
Yours Sincerely,
YYY
职位
公司名
联系

看一下这个例子吧，这是美国公司给我发的邮件，其实他们说的都挺好的，但可能是看书本上的东西看多了，其实实际应用中和书本上看到的是不一样的。
信件内容：
Good day:

We are pleased to present our report and recommendations regarding the labeling material that you...

基本格式很简单，主要就是开头称呼和结尾祝语。
Dear Mr. xx
Best regards,（这个是比Yours Sincerely更常用的，虽然读书的时候教的是这个）
June Ye(你的名字)
正不正式还要看你的内容里面的用词了。多用一些礼貌用语吧，比如thanks for your time, your prompt reply is much appre...