@example
@code{/* Prefix @emph{envelope_} is reserve */}
@code{#include <mailutils/envelope.h>}

@end example

@deftypefun int envelope_create (envelope_t *, void *);
@end deftypefun

@deftypefun void envelope_destroy (envelope_t *, void *);
@end deftypefun

@deftypefun int envelope_get_message (envelope_t, message_t *);
@end deftypefun

@deftypefun int envelope_set_sender (envelope_t, int (*_sender) __P ((envelope_t, char *, size_t, size_t*)), void *);
@end deftypefun

@deftypefun int envelope_sender (envelope_t, char *, size_t, size_t *);
@end deftypefun

@deftypefun int envelope_set_date (envelope_t, int (*_date) __P ((envelope_t, char *, size_t, size_t *)), void *);
@end deftypefun

@deftypefun int envelope_date (envelope_t, char *, size_t, size_t *);
@end deftypefun