mh-signature-separator

mh-signature-separator is a variable defined in `mh-e.el'.
Its value is

"-- 
"

Documentation:
Text of a signature separator.

A signature separator is used to separate the body of a message
from the signature. This can be used by user agents such as MH-E
to render the signature differently or to suppress the inclusion
of the signature in a reply. Use `mh-signature-separator-regexp'
when searching for a separator.