ENVELOPE *mutt_read_rfc822_header(FILE *, HEADER *, short, short);
int mutt_count_body_parts (HEADER *hdr, int flags);
+int mutt_is_message_type(BODY *);
int mutt_is_multipart_encrypted(BODY *);
int mutt_is_multipart_signed(BODY *);
int mutt_is_application_pgp(BODY *);