This is complicated, when from an MUA perspective, an ISP will accept you smtp *only* if it is from its dialup/customer network. ie. You are connected to the net via some other ISP (there are many reasons for this) and you need to send mail. Logically this would be sent to your ISP's smtp server, but it is blocked because you are not on their network.
The other issue that causes the above scenario, is that most MUAs default to *not* authenticated connection. The ISPs try to make it as easy for the dumb users as possible (obviously this list by nature does not have dumb users - lets face it dumb users do not administer xmail server). So to make it easy they allow unauthenticated smtp delivery (from their network). The biggest driver of authenticated MUA smtp delivery would be if the MUA was written to try authenticated delivery first, then fell back to unauthenticated. Eventually most MUAs & ISPs would permit only authenticated delivery. That solves the MUA side, then the MTA side is a different story and has been covered in this thread before. Rob :) > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Michael Schwarz > Sent: Thursday, February 05, 2004 6:38 AM > To: [EMAIL PROTECTED] > Subject: [xmail] fighting against spam... > > Hello all > > Something for discussion: > > In my opinion would fighting against spam be so easy > if we have this consens in the whole internet-'family': > > - each smtp-server accepts mails only: > > from servers with fixed IPs and DNS is set correct > (not in the range of dailups-IPs) > > and for his hosted domains > > - a user can sent mail only: > > over his ISP or freemailservice > > his own server with fixed IP (see above) > > The mailammount should be limited, 100/hour or so. > Each ISP MUST provide mailservice for his customers! > > If each of these points are accepted, a server from which comes > spam is easy to blacklist(for all). > > What do you think above this? > > Just my 2c > > Michael > > - > To unsubscribe from this list: send the line "unsubscribe xmail" in > the body of a message to [EMAIL PROTECTED] > For general help: send the line "help" in the body of a message to > [EMAIL PROTECTED] > > - To unsubscribe from this list: send the line "unsubscribe xmail" in the body of a message to [EMAIL PROTECTED] For general help: send the line "help" in the body of a message to [EMAIL PROTECTED]
