Hi! I have some problem with my zimbra mail all send mail when client received is all in spam yahoo, msn, google... etc been reading some post here from the forum and still I have no success trying to setup been following this guide from this url.

Set Up DKIM For Multiple Domains On Postfix With dkim-milter 2.8.x (CentOS 5.3) | HowtoForge - Linux Howtos and Tutorials

Installing DKIM for Zimbra on CentOS or Red Hat | Le blog d'Étienne Pouliot

By they way I have multiple domain. ea. mydomain1.com, mydomain2.com

Everytime I restart zmmtactl the config that I append on master.cf is gone.