Re: sendmail ssl authentication

[asjo@koldfront.dk (Adam Sjøgren)]

On Sat, 17 May 2008 18:46:27 -0500, reader@newsguy.com wrote:

> So did you mean that it is common for ISPs to block their own users
> but not users from the internet?  What would that do for them.

It would prevent their users from beying exploited as a spam-relay and
sending spam out through their own ISP.

> It seems it would more likely help them to do it the other way round
> or like you said... just block all to port 25.

Spam makes people do annoying things.

> But it turns out there is an smtp server running on port 25 but I
> cannot get to it, but people on the internet can...

> On the face of it, it sounds ridiculous, so I don't understand why
> they would do that.

They need to accept email from the net, obviously.

A guess would be that for their own users - to minimize the spam that
they are "responsible" for - they have a description that says how their
users should send email (probably via another port, 587 maybe, and with
a login/password) and port 25 is blocked.

It is important for some ISPs to "keep their own backyard clean" - but
they can't ask other people in the world to follow their special
guidelines (only their own customers have login/passwords).

I think it makes perfect, albeit twisted, sense.


  Best regards,

    Adam

-- 
 "Gravity is arbitrary!"                                      Adam Sjøgren
                                                         asjo@koldfront.dk