<html><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px"><div id="yui_3_16_0_1_1438100178375_12999" dir="ltr">Hello,<br class=""><br class="">I just follow the procedure to make the Kolab multi-domain server with the following pages:<br class="">https://docs.kolab.org/howtos/multi-domain.html#amavisd-changes<br class="">http://kolab.org/blog/cornelius-hald/2015/01/05/kolab-3.3-multi-domain-setup-centos-7<br class=""><br class="">I can connect with users in new domains and send mail locally.<br class=""><br class="">When I try to send mail to the outside, the following error message appears in the webmail:<br class="">SMTP Error (451): failed when adding the recipient "admin@mail.zimbra.com" (4.3.0 <admin@mail.zimbra.com>: Temporary lookup failure)<br class=""><br class="">What should I do to correct this?<br class=""><br class="">thank you in advance ! :-)</div><div id="yui_3_16_0_1_1438100178375_13112" dir="ltr"><br></div><div dir="ltr">Martin<br></div></div></body></html>