ocr: Help File smtp These commands are used for the Simple Message Transport Protocol service (that is, mail). smtp batch Ionloff> Display or set the smtp batch flag. When set to 'on', messages in the outgoing mail queue are sent as a batch, whereby many of the SMTP commands are sent in one fell swoop, before waiting for responses. (Unfortunately this breaks many brain-damaged SMTP servers, and SO may not be usable in practice). smtp gateway <hostid> Displays or sets the host to be used as a "smart" mail relay. Any mail sent to a host not in the host table will instead be sent to the gateway for fo ...