Re: Postfix is spammer-friendly by default on potato and woody

[Ethan Benson]

On Thu, Nov 02, 2000 at 01:17:21PM +0100, Peter Palfrader wrote:
> Hi!
> 
> On Thu, 02 Nov 2000, Borut Mrak wrote:
> 
> > On Thu, Nov 02, 2000 at 02:24:36AM -0900, Ethan Benson wrote:
> > > so my question now is postfix a open relay by default or not?  
> > 
> > No.
> 
> It is.  For a (not so) small set of hosts. Assuming your box is 62.1.2.3 you
> will be an open relay for the entire _class_A_ net 62.
> 
> If you do not set mynetworks postfix guesses it from the interfaces and allows
> all hosts on the classful subnets of those interfaces to relay through you.

ah! i see didn't think of that one... so you need to specify
mynetworks with the correct subnet.  

-- 
Ethan Benson
http://www.alaska.net/~erbenson/

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