Re: [0.0.0.0]

>>> nice try.  but in practice if you try to connect to 0.0.0.0 you'll 
>>> get
>>> an error, which is what we want to happen.
>
>> That depends on your OS:
>
>> mine$ uname -a
>> SunOS mine 5.9 Generic_117171-12 sun4u sparc SUNW,Ultra-2
>> mine$ telnet 0.0.0.0 25
>> Trying 0.0.0.0...
>> Connected to 0.0.0.0.
>> Escape character is '^]'.
>> 220 mine ESMTP Sendmail 8.13.1/8.13.1; Mon, 28 Feb 2005 05:48:09 
>> +0100 (MET)
>
> windlord:~> uname -a
> Linux windlord 2.4.26 #1 Tue Apr 20 16:17:15 PDT 2004 i686 GNU/Linux
> windlord:~> telnet 0.0.0.0 smtp
> Trying 0.0.0.0...
> Connected to 0.0.0.0 (0.0.0.0).
> Escape character is '^]'.
> 220 windlord.stanford.edu ESMTP
> quit
> 221 windlord.stanford.edu
> Connection closed by foreign host.

sigh.  I stand corrected.  (I thought I had tried these cases, but must 
have tried something else.)