By default, Distribution list in Zimbra can be sent from anywhere (internal domain and external domain). if you want to restrict from some users or internal domain only, please try this guidance # Enable Milter You must enable milter. Login to Zimbra Admin | Configure | Global Settings | MTA. Please checklist on Enable milter server. Next, restart milter ..
Previously, i have been explain how to restrict users to send mails to certain users/domains using CBPolicyd. This article have same aims with previous article, but in this case, we must do some modification on Postfix to get it works. This is how to apply it Do the following command as user Zimbra 1. Open file /opt/zimbra/conf/zmconfigd/smtpd_sender_restrictions.cf ..
Policyd has module access control. This module can use for some aims as improving anti spam reject unlisted domain like article has been wrote before. Module access control also can use for restrict users sending to certain users/domains and this article will explain how to apply. Assume you have been install and configure policyd like the ..