Re: [Fwd: Re: Spamassasin over RBL, was Re: rblsmtpd -t?]
On Tue, 7 May 2002 19:48, Jason Lim wrote:
> And I also believe in it, because it is very possible that one of the
> tests to determine if it is an open-relay is braindead... what if I made a
> mail server that pretends it will relay email, but in fact does not, and
> actually records the IP that tried to abuse the open relay and reports it
> to the admins (i consider that very whitehat)? My point is that the test
> is not foolproof either... unlike your "everything is black and white"
If you can send a cryptographically signed message is to a mail server
outside your network and addressed to a machine in your network, if you
receive it at it's destination and the crypto sign matches then you know it's
an open relay.
> This word is not "black or white"... if only it were.
Open relay tests are very "black or white".
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