英文信件格式
Friendly Letter:
Friendly letters, also known as personal letters or bread-and-butter letters, are different from formal letters (e.g. business letters) in format. A friendly letter normally contains 5 parts:
1)The Heading
Return Address: it gives the full address of the writer and the date of the letter. It is usually written or typed in the upper right-hand corner of the page.

Inside Address: The address, which is often omitted in personal letters, gives the name and full addressee.
2) The Greeting (Salutation): The greeting always ends with a comma. The greeting may be formal, beginning with the word "dear" and using the person's given name or relationship, or it may be informal if appropriate.