Re: [Exim] Fake mailing

> > I've seen otherwise. Raptor firewall can detect the difference and has the
> > option to disable usage of telnetting to port 25. IIRC, telnet doesn't use
> > read/write to send data and has other tcp properties. I could be wrong, but
> > I tried it myself and telnet was refused where as an mta connection wasn't.
> > It didn't stop netcat though.
>
> Sounds like options negotiation - telnet sends some semi-out-of-band
> info to negotiation settings.

I see. It does seem silly/stupid to stop connections like that. It's quite
easy to use another program like netcat. I doubt spamware even bothers
negotiating anything.

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