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#### 3.18.10 Article Signature

Each article is divided into two parts—the head and the body. The body can be divided into a signature part and a text part. The variable that says what is to be considered a signature is `gnus-signature-separator`. This is normally the standard ‘`^-- $`’ as mandated by son-of-RFC 1036. However, many people use non-standard signature separators, so this variable can also be a list of regular expressions to be tested, one by one. (Searches are done from the end of the body towards the beginning.) One likely value is:

         (setq gnus-signature-separator
               '("^-- $"         ; The standard
                 "^-- *$"        ; A common mangling
                 "^-------*$"    ; Many people just use a looong
                                 ; line of dashes.  Shame!
                 "^ *--------*$" ; Double-shame!
                 "^________*$"   ; Underscores are also popular
                 "^========*$")) ; Pervert!

The more permissive you are, the more likely it is that you'll get false positives.

`gnus-signature-limit` provides a limit to what is considered a signature when displaying articles.

1. If it is an integer, no signature may be longer (in characters) than that integer.
2. If it is a floating point number, no signature may be longer (in lines) than that number.
3. If it is a function, the function will be called without any parameters, and if it returns `nil`, there is no signature in the buffer.
4. If it is a string, it will be used as a regexp. If it matches, the text in question is not a signature.

This variable can also be a list where the elements may be of the types listed above. Here's an example:

         (setq gnus-signature-limit
               '(200.0 "^---*Forwarded article"))

This means that if there are more than 200 lines after the signature separator, or the text after the signature separator is matched by the regular expression ‘`^---*Forwarded article`’, then it isn't a signature after all.