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Disable reverse lookups with qmail in Plesk

·82 words·1 min·

To disable reverse lookups in qmail with Plesk, simply add -Rt0 to the server_args line in /etc/xinetd.d/smtp_psa

service smtp
        socket_type     = stream
        protocol        = tcp
        wait            = no
        disable         = no
        user            = root
        instances       = UNLIMITED
        server          = /var/qmail/bin/tcp-env
        server_args     = <strong>-Rt0</strong> /usr/sbin/rblsmtpd  -r /var/qmail/bin/relaylock /var/qmail/bin/qmail-smtpd /var/qmail/bin/smtp_auth /var/qmail/bin/true /var/qmail/bin/cmd5checkpw /var/qmail/bin/true

Once that’s been saved, simply restart xinetd:

# /etc/init.d/xinetd restart

WATCH OUT! This change will be overwritten if you change certain mail settings in Plesk, like MAPS protection.