ispell-mime-skip-part

ispell-mime-skip-part is a compiled Lisp function in `ispell.el'.

(ispell-mime-skip-part BOUNDARY)

Move point across header, or entire MIME part if message is encoded.
All specified types except `7bit' `8bit' and `quoted-printable' are considered
encoded and therefore skipped. See rfc 1521, 2183, ...
If no boundary is given, then entire message is skipped.

This starts one line ABOVE the MIME content messages, on the boundary marker,
for operation with the generic region-skipping code.
This places new MIME boundaries into variable `ispell-checking-message'.