Re: SMTP authentication for broadband providers

[Lou Katz <lou () metron com>]

On Thu, Feb 12, 2004 at 08:48:06PM +0000, Miquel van Smoorenburg wrote:
> In article <cistron.20040212023825.GA77062 () metron com>,
> Lou Katz  <lou () metron com> wrote:
> > On Wed, Feb 11, 2004 at 03:13:30PM -0500, Sean Donelan wrote:
> > > On Wed, 11 Feb 2004 Valdis.Kletnieks () vt edu wrote:
> > > > On Wed, 11 Feb 2004 11:15:20 PST, Dave Crocker said:
> > > > > what about port 25 blocking that is now done by many access providers?
> > > > > this makes it impossible for mobile users, coming from those providers,
> > > > > to access your server and do the auth.
> > > >
> > > > Port 587.
> > >
> > > So is it time for ISPs to start blocking port 587 too?
> > >
> > > If the complaints are going back to the IP address anwyay, why shouldn't
> > > an ISP force it subscribers to go through the ISPs mail servers so it can
> > > control any messages sent by its subscribers?
> >
> >
> > Because, maybe, I don't think it is a good idea for someone else to CONTROL
> > any messages I might send. Who will control the controllers?
>
> As if they don't yet CONTROL the messages you receive ? Where,
> exactly, is your POP3/IMAP mailbox located ? Ah, you run your own
> mailserver for your own domain. So, you can use the submission
> port on your own mailserver, right ?
>
> Mike.

Correct, unless my ISP stops giving me full connectivity and starts blocking
incoming (and outgoing) ports at whim. In my country, no large commercial
entity, nor any government entity can be trusted, as has repeatedly been shown.

I can locally submit to my mailserver, but if it tries to make an outbound
connection on port 25 to a client's mailserver, and that is blocked, than
all confidentiality of business or personal communication is gone.
-- 
-=[L]=-