Hello,
I have a VM on a CentOS 7 OpenVZ and i have install Kolab. I just follow the procedure to make the Kolab multi-domain server with the following pages: https://docs.kolab.org/howtos/multi-domain.html#amavisd-changes http://kolab.org/blog/cornelius-hald/2015/01/05/kolab-3.3-multi-domain-setup-centos-7 I can connect with users in new domains and send mail locally. When I try to send mail (with roundcube) to the outside, the following error message appears in the webmail: SMTP Error (451): failed when adding the recipient "ad...@mail.zimbra.com" (4.3.0 <ad...@mail.zimbra.com>: Temporary lookup failure) What should I do to correct this? thank you in advance ! :-)