RE: qmail or postfix ??


Subject: RE: qmail or postfix ??
From: Leif Sawyer (lsawyer@gci.com)
Date: Thu May 01 2003 - 07:58:39 AKDT


James Zuelow writes:
> While I am a dedicated Postfix user, I notice that
> spam-proofing Qmail is featured in the SysAdmin issue that
> arrived today. (Thus tying in the spam-conspiracy thread
> *and* the Qmail thread.)
>
> Unfortunately, it isn't a "featured" article for their web
> page so you can't read it online. Does the UAA library
> subscribe to SysAdmin? Any shops in Anchortowne carry it?

I've got a copy of SysAdmin right here on my desk..
So here's the article in a nutshell:

Outbound Spam:
        Install the SMTPd-AUTH patch, so you can authenticate your
        smtp connections..
        http://members.elysium.pl/brush/qmail-smtpd-auth

        Use TCPwrappers and the RELAYCLIENT option of qmail to limit
        the local hosts that can connect to your smtp server.

Inbound Spam:
        Per-User filtering (as specified in the users .qmail file)
                preline ~/myfilter.pl

        SpamAssassin:
                preline spamassassin

        Use the Mail::SpamAssasin perl module (or in combination with:)

        Use the Mail::Audit perl module to create per-user filtering
        scripts like:

                #!/usr/bin/perl
                use Mail::Audit
                my($msg) = new Mail::Audit;
                if ($msg-bcc) {
                        $msg-reject;
                }
                if ( $msg-subject =~ /viagra/i ) {
                        $msg-reject;
                }
                if ( $msg-subject =~ /business[ ]+opportunity/i ) {
                        $msg-resend('collector@spamcollector.com');
                }

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