On Wed, 27 Nov 1996, Jukka Marin wrote:

> > >However, it would mean source hacks to some part of the mail system, to
> > >sendmail in my case.  I'm not afraid to dive into sendmail, but it
> > >really does seem like an ugly layering violation.  Dunno what else to
> > >do, though.
> > 
> > Could this be a good application of the inetd functionality that mrg
> > recently added?  i.e. inetd checks the IP address (or domain) of the
> > machine trying to connect to the SMTP port, and refuses the connection
> > if it matches a known spam engine.
> 
> You would have to make inetd launch sendmail, then.  In the default
> configuration, sendmail is running all the time and receiving the
> connections by itself.  Starting sendmail from inetd could cause a great
> performance loss on busy mail servers...

And anyway, most of that mail goes through one or more relay agents (like 
MICmail, for example).  So the connection owuld not be from the spam 
engine itself, but from the relay(s).  

> 
>   -jm
> 
> -- 
> 
>                      ---> http://www.jmp.fi/~jmarin/ <---
>