[Mimedefang] filter_relay rejected host. (DNSBL)

[Lars Bjærris]

Hello, 


Can anybody help me figure out why the below code in "/etc/mail/mimedefang-filter" rejects email from all connecting sender ip's?

##############
sub filter_relay {

        my ( $ip, $name, $helo) = @_;
        if (relay_is_blacklisted($ip, ‘zen.spamhaus.org’)) {
        return(‘REJECT’, ‘You are listed in zen.spamhaus.org’);
        }
}
##############

Server is running:
CentOS 6.5  
mimedefang-2.70-1
perl-5.10


From maillog:

sendmail[29960]: s2L79ImJ029960: Milter (mimedefang): init success to negotiate
 sendmail[29960]: s2L79ImJ029960: Milter: connect to filters
 mimedefang.pl[29937]: filter_relay rejected host xx.xx.xx.xx (connecting-mxserver.com)
 sendmail[29960]: s2L79ImJ029960: milter=mimedefang, action=connect, reject
 sendmail[29960]: s2L79ImJ029960: Milter: connect, ending
 sendmail[29960]: s2L79ImJ029960: Milter (mimedefang): quit filter
 sendmail[29960]: s2L79ImJ029960: Milter: connect: host=connecting-mxserver.com, addr=xx.xx.xx.xx, rejecting commands
 sendmail[29960]: s2L79ImJ029960: --- 554 mimedefang-server.com ESMTP not accepting messages
 sendmail[29960]: s2L79ImJ029960: <-- QUIT
 sendmail[29960]: s2L79ImJ029960: --- 221 2.0.0 mimedefang-server.com closing connection
 sendmail[29960]: s2L79ImJ029960: Milter (mimedefang): quit filter


Best regards
Lars Bjaerris