From: Rob Chanter (robcadelie.national.com.au)
Date: Mon Aug 02 2004 - 23:24:48 CDT

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On Mon, Aug 02, 2004 at 11:07:11PM -0500, Chris wrote:

> Ok - lemme rephase. Along with a legit IP in the above example, is it
> required to have 127.0.0.1/8? If yes, what happens if it not there.
> If no - are there ramifications.

Should be 127.0.0.0/8 or 127.0.0.1/32.

>
> Perhaps I didn't articulate (being late and working long hours).
 
Not required AFAIK, but it won't prevent mail being submitted locally
unless you also secure the sendmail binary and anything else that might
invoke postdrop or otherwise put things in the maildrop queue.

Even then, someone logged in locally can still connect to the
non-loopback address. Apart from multi-instance setups, I can't think of
any reason you'd want to omit localhost from inet_interfaces.

cheers
rob c

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