What are all the parts of a letter?

Answer 1

Which letter did you have in mind?

Answer 2

I believe there are different letter types:
Microsoft Word's letter template includes:
Heading (top. That would be the place to put a logo in a business letter.)
Return address (name, address, city state zip)
Date
Recipient address (name, address, city state zip)
Salutation , or Salutation:
Body (intro, body, conclusion paragraphs)
Closing
Signature
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In elementary school, the 5 parts of a friendly letter are
heading, greeting, body, closing, signature
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A business letter officially has:
Letterhead (or typed heading)
Date
Inside address
salutation
body
complimentary closing
signature
(beneath which is the typed signature)
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This website will walk you through the parts of a friendly letterand help you write one:
http://readwritethink.org/materials/letter_generator/
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I have seen more parts added to business letters. Sometimes they have sender and recipient addresses,
a cc: line, and additional file notations and addendums.
They are usually flush left, with spaces between paragraphs. (This differs from friendly letters which
are usually indented with no extra lines between paragraphs.

Answer 3

for a formal letter
the date
your address
address of recipient/or organization
salutation (Dear etc.)
body of letter
closing (sincerely etc)
name/signature
formal letters don't have a ps

Answer 4

The return address
The date
The addressee
The greeting (salutation)
The body of the letter
The closing
The signature
The postscript