英文书信的开头问候语有哪些

一：开始语
1、Thank you for your letter of September 1.
2、Many thanks for your kind letter which reached me yesterday.
3、You letter come to me this morning.
4、I was delighted to receive your letter .
5、I am in receipt of your letter .
6、It’s a long time since I saw your last .
7、I have been missing you a lot since we met last time .
8、I am sorry for not writing to you sooner .
9、I am writing to you tell that ……
10.I often think of you. How are you recently?
Thank you for your kind letter（谢谢你的友好来信。）
I was so pleased to receive your letter（收到你的来信我十分高兴。）
I have just received your kind letter（已接到你的友好来信。）
I was pleased to hear from you．．．（……收到你的来信，我非常高兴。）
I have just this moment received your letter and I am writing at once because．．．（我此时收到你的来信，便立即写信，因为……）
Your letter of．．．was duly received（你……的来函已妥收。）
Your letter came to（reached）me this morning．（今晨收到你的来信。）
Many thanks for your last kind letter．（接最近来信，感激之至。）
I am sorry it has taken me a long time to reply to your last letter but．．．（很抱歉，这么久才回你的上次来信，只是……）
What a surprise it was to get a letter from you．（收到你的来信我感到很吃惊。）
I was very sorry to hea．．．（听到……感到很不安。）
You will be very glad to hear that．．．（听到……你会非常高兴。）
From your letter I learned that．．．（从你的信中知道……）
With great delight I learned that．．．（我得知……非常高兴。）
I often think of you．How have you been recently ？（我常想到你，你近来好吗？）
Sorry for delaying this letter so long．（这封信耽搁了很久了，真对不起。）
I have the pleasure to tell you that．．（我高兴地告诉你……）

写信开头都要说几句无关痛痒的问候语似乎是中文的习惯，什么“最近还好吗？”“好久没写信了，你怎么样？”以及“写这封信是为了......."
其实感觉上英语里并没有这么多不必要的客套，尤其是工作上的都会就事论事。如果你实在觉得不写实在不舒服，那就加上
How are you?
How have you been?
I hope everything is fine with you.
Hope you enjoy your day.
(或者）Here I am again.
It's me again.
邮件比较频繁的话，直接说Good morning/afternoon就ok了。
然后就言归正传，谈谈现在的或上封信的问题。

一般都是用dear sir或者dear madam，如果是自己的朋友，就可以更随意了。

hello
how are you