祝贺信的主要内容：(1)祝贺事由；(2)祝贺语及正文；(3)结束语
祝贺信是一种向收信人表示祝贺的信件，一般用于对方有什么喜事或取得了什么成绩，如婚姻、节日、寿诞、毕业等。
祝贺信是人们情感交流的一种方式，多写祝贺信可以使亲友同事之间加强联系，增进亲情。
祝贺信如同一般的简短书信，可长可短，格式上无特别的要求，但书写时应做到真诚、自然、亲切动人。内容上可尽情发挥。主要是以祝贺事由开头，随后写正文祝贺语发表自己的看法并用热情的语言向对方表示鼓励、赞扬、祝福。有时，也可以有所发挥，谈一些相关的看法和建议。如在祝贺成绩的贺信中，可以分析一下对方所取得成绩的主客观原因，最后用结束语结束。
范例：
1、贺生日 Congratulations on a birthday
Dear Babs:
So you're a year older today —— or don't you want to be reminded? Anyway, congratulations and best wishes.
If you feel like holding a celebration, will you let me take you to dinner and the movies, as a sort of birthday treat? You name the day. And in the mealtime, many happy returns!
Cordially,
Tom
亲爱的巴博斯：
今天您又大了[一岁]了，您不喜欢别人这样对你讲吗?但不管怎样，我得向您祝贺，表示美好的祝愿。
如果您对庆贺有雅兴的话，我想请您吃饭，或看电影，作为祝贺您生日的款待。请定个日期，同时，祝您幸福愉快!
2、祝贺朋友大学毕业 Congratulations on graduation
Dear Mr. Li:
I learned from Wang Ying that you were graduated with high honors from Huabei University yesterday. I can well imagine how proud of you your parents are now, who have been anxiously hoping to witness your brilliant success. As I understand, you will continue studies in the United States soon. I wish you greater success in your studies and research work.
With best wishes.
Yours sincerely,
Tom
亲爱的李先生：
从王英处得悉你以优异的成绩毕业于华北清华大学，我可以想像，你的父母现在是怎样地引以为荣。他们一直殷切地希望你获得辉煌的成就。我听说你不久要到美国去继续深造。预祝你在学习和研究工作上取得更大的成就。
3、祝贺新年 A letter extending New Year greetings
Dear Mr. Barton:
As the New Year is quickly approaching, I take this opportunity to send my greetings and best wishes to you for 2009.
I hope that the coming year will bring a further increase in exchange of culture between our two countries and we look forward to continued friendly relations with you.
Yours faithfully,
Tom
亲爱的巴顿先生：
至此2009年即将到来之际，我谨向你致以最良好的祝愿和问候。
我希望，在新的一年里我们两国之间的文化交流有进一步的增加，并希望我们与你们之间的友好关系继续下去。
