> From:  [EMAIL PROTECTED]
> Date:  Thu, 28 Jan 1999 12:20:14 +0100 (MET)
>
> On Wed, 27 Jan 1999 [EMAIL PROTECTED] wrote:
> 
> > > That's not what we are discussing. I'm not paying you to receive my mai
> l,
> > > your users are paying you, so that they can receive _their_ mail. Eithe
> r
> > > them come from dial-up or not.
> > 
> > There are some services we choose to offer to our customers and there are
> > some services that we choose not to offer to our customers.  If someone w
> ants
> > a service we do not offer, we advise the to find someone who does.
> 
> This is not a service that you offer, like extra POP accounts, detailed
> accounting by the second, whatever. This is something you are _NOT_
> providing. Or before users sign the contract, you SPECIFICALLY say, _WE DO
> NOT_ accept mail sent directly from dial-ups?

Hopefully, you do say that you don't allow the sending of SPAM from your 
customers.  You can then route all your dialup users through a ipmasq firewall 
and make sure a line like this is in the firewall's rc files:

/sbin/ipfwadm -I -a accept -P tcp -S 10.0.0.0/8 -D default/0 25 -r 25

Now, anything they try to send to port 25 anywhere will be intercepted by qmail
on your firewall and you can filter it out yourselves only allowing outgoing
mail with sender domains which belong to your customers.  You aren't 
stopping legitimate SMTP traffic, you're simply keeping your customers honest. 

Chris

-- 
Chris Garrigues                 Deep Eddy Internet Consulting
+1 512 432 4046                 609 Deep Eddy Avenue                    O-
http://www.DeepEddy.Com/~cwg/   Austin, TX  78703-4513

  My email address is an experiment in SPAM elimination.  For an
  explanation of what we're doing, see http://www.DeepEddy.Com/tms.html 

    Nobody ever got fired for buying Microsoft,
      but they could get fired for relying on Microsoft.


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