Iljitsch van Beijnum wrote: > On 16-aug-2007, at 21:30, SM wrote: > >> It would also restrict you to using a Return-path which is valid for >> the network from which you are sending the mail. That may not be >> practical in some environments where you don't have an existing >> account and you can only send mail through the local mail server (no >> access to submission port on home server, e.g. outgoing TCP 587 >> blocked or network unreachable). > > So what you're saying is that any mail server should be able to source > messages from any mail user using any email address in any domain. > > Sorry, that's not a reasonable desire in my opinion. what's unreasonable is trying to use IP addresses as authentication tokens, or expecting applications to know about network topology in order to route messages. _______________________________________________ Ietf@xxxxxxxx https://www1.ietf.org/mailman/listinfo/ietf