message-headers-to-generate

message-headers-to-generate is a compiled Lisp function in `message.el'.

(message-headers-to-generate HEADERS INCLUDED-HEADERS EXCLUDED-HEADERS)

Return a list that includes all headers from HEADERS.
If INCLUDED-HEADERS is a list, just include those headers. If it is
t, include all headers. In any case, headers from EXCLUDED-HEADERS
are not included.