Re: Port 25 - Blacklash

[Joe Maimon <jmaimon () ttec com>]

Suresh Ramasubramanian wrote:
> On 4/27/05, Joel Jaeggli <joelja () darkwing uoregon edu> wrote:
>
> > > In any event the malware is already ahead of port 25 blocking and is
> > > leveraging ISP smarthosting. SMTP-Auth is the pill to ease this pain/
> >
> > Really smtp-auth will solve it? or do most windows mua's cache your
> > password?
>
>
> They sure do cache the password.
>
> But with smtp auth, the infected user is stamped in the email headers,
> and all over my MTA logs, when a bot that hijacks his PC starts
> spamming.
>
> I can easily remove auth privileges for his account, and/or limit his
> access to a walled garden till such time as he cleans up - without
> taking the trouble to match timestamps of the spam + dig into radius
> logs
>
> Easier to identify, and easier to lock down, than unauthenticated access
>
> --srs
You forgot to add the ability to rate-limit by ip sender or by 
authenticated user, all tools in bringing trojaned users under control.