definition of signature separator

[Matthias Apitz <guru@xxxxxxxxxxx>]

Hello,

Mutt separates correctly the text and my signature (from the file
~/.elm/signature) in the body by inserting the '-- \n' line; 

I'm asking me, where this definition of '-- \n' in Internet comes from?
Any RFC or other pointer?

Thx

        matthias
-- 
Matthias Apitz
Manager Technical Support - OCLC GmbH
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