[afnog] is my sendmail an open-relay?

[Peter Nyamukusa]

Hi walu,

I have been using sendmail for a while now and below are the configs I have 
been using to secure my sendmail

in /etc/mail/ create a file called relay-domains and put the ip block of you 
lan in the format 192.168.1. to represent a 24 bit subnet mask on the 
192.168.1.0/24 network also in the same location (/etc/mail/) there is a file 
called access which you can tweak as in the example below

# by default we allow relaying from localhost...
yourdomain.com             RELAY
localhost                        RELAY
127.0.0.1                       RELAY
blacklisteddomain.com   REJECT

Regards 

Peter Nyamukusa (CCNA, MCSE, A+)

On Tuesday 07 November 2006 17:54, John Walubengo wrote:
> folks,
>
> how do i ensure my mail server is not acting as an open
> relay? Am runing sendmail 8.12.x on RH9. I wish to have
> sendmail recieving ONLY mail destined to my domain and
> sending out ONLY mail originating from my private network.
>
> which files do I need to tweak/review?
>
> walu.
>
>
>
>
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