message($body)

from($from[, $name = ''[, $return_path = NULL]])

clear([$clear_attachments = FALSE])

attach($filename[, $disposition = ''[, $newname = NULL[, $mime = '']]])

set_alt_message($str)

subject($subject)

bcc($bcc[, $limit = ''])

set_header($header, $value)

attachment_cid($filename)

send([$auto_clear = TRUE])