address_t *mutt_default_from (void);
address_t *mutt_remove_duplicates (address_t *);
-address_t *mutt_parse_adrlist (address_t *, const char *);
BODY *mutt_make_file_attach (const char *);
BODY *mutt_make_message_attach (CONTEXT *, HEADER *, int);
LIST *mutt_make_references (ENVELOPE * e);
-ENVELOPE *mutt_read_rfc822_header (FILE *, HEADER *, short, short);
HEADER *mutt_dup_header (HEADER *);
int mutt_cmp_header (const HEADER*, const HEADER*);