On Sun, Feb 27, 2005, Keith Moore wrote:
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)
mine# date | /usr/lib/sendmail -Am -v 'user(_at_)[0(_dot_)0(_dot_)0(_dot_)0]'
user(_at_)[0(_dot_)0(_dot_)0(_dot_)0](_dot_)(_dot_)(_dot_) Connecting to
[0.0.0.0] via smtp8...
220 mine ESMTP Sendmail 8.13.1/8.13.1; Mon, 28 Feb 2005 05:48:19 +0100 (MET)