RE: Postfix SPAM Issue Clarification

[aljuhani <aljuhani zajil net>]

Hi.

You can post the header of one of the spam messages here.  Also, you can test 
your mail server relay (if open to outside world) by simply trying yourself 
from any ISP to relay messages through your box, OR you can test online.  Go 
to http://www.abuse.net/relay.html and in the form just enter the first field 
[Address to test:(as host name or dotted quad)] and click [Test for relay].

Also, there are Postfix mailing lists you can search for similar problems:

postfix-users: http://marc.theaimsgroup.com/?l=postfix-users&r=1&w=2


Al-Juhani
aljuhani zajil net

----- Original Message ----- 
From: "Nicholas Marsh" <nmarsh1 mac com>
To: <redhat-list redhat com>
Sent: Monday, December 23, 2002 00:25
Subject: Postfix SPAM Issue Clarification


> Sorry, I didn't give enough info in the previous message. Here is that I 
have...
>
> A RedHat box the has 2 NICs, 1 on our internal network and 1 on our public 
network (from our ISP). The RedHat Box acts as a mail relay for 2 internal 
servers. It uses IP Tables for filtering. All the internal traffic is 
masquareded. Everything from the public network is blocked.
>
> I was checking the mailq for dead messages and I saw a ton of bounced 
messages. Subject: Cheap p0rn... free passes...
>
> I don't have too many options set in main.cf
>
> myorigin = something.com
> mynetworks_style = class
> #mydestination = $myhostname, localhost.$mydomain
> #relay_domains = $mydestination
>
> I assume I need to do something about relay domains. Any ideas on the 
correct syntax to allow only my internal hosts to send mail?
>
> Thanks!
>
> nick marsh
> nmarsh1 mac com