Re: [Exim] Fake mailing

> > I have try to find description about exim n' "fake mailing" telnet host
> > 25
>
> There is no such distinction between a "faked with telnet" and "real" mail
> session. They're both just TCP connections. Your Exim daemon has no idea
> whether the entity on the other end of the connection is someone with a
> telnet client or an MTA.

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.

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