gnus-treat-strip-headers-in-body

gnus-treat-strip-headers-in-body is a variable defined in `gnus-art.el'.
Its value is

t

Documentation:
Strip the X-No-Archive header line from the beginning of the body.
Valid values are nil, t, `head', `first', `last', an integer or a
predicate. See Info node `(gnus)Customizing Articles'.

You can customize this variable.

This variable was introduced, or its default value was changed, in version 21.1 of Emacs.