Zimbra - message milter-reject: END-OF-MESSAGE

Got resolved wiht the following. Check the value of milter_default_action

    su - zimbra
    postconf milter_default_action

If it returns as -- milter_default_action = tempfail

Run the following commands (as the zimbra user) to change the value:-

    postconf -e milter_default_action=accept
    zmconfigdctl restart
    zmmilterctl restart
    zmmtactl restart