Richard wrote
Intermittently connected users are served by RFC2305+ now, its just that
the nature of SMTP beast means you cannot do some things that need to be
done to achieve reliable transmission with our goals in mind. The needs of
some intermittent users may be served by IPP gateway services, its just how
far do we go down that road.
In view of 70+ million fax users world wide, few of whom may ever have anything but intermittent Internet connections, I'd suggest going as far down the road as humanly possible.
Geoff