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 services from CLI
1.
su
- zimbra
2.
zmmilterctl restart
3.
zmmilterctl status
# Give the owner to distribution list
Please create/select existing distribution list that want to configure restrict. Edit and give the owner. The following is example iman@imanudin.net as the owner against allusers@imanudin.net distribution list
# Configure restrict
– Please login to webmail the owner of distribution list (iman@imanudin.net)
– Go to Contacts menu | Distribution Lists
– Right click on Distribution list and select Edit Distribution List
– Go to Distribution List Properties menu and configure who users can send to DL
– Go to Contacts menu | Distribution Lists
– Right click on Distribution list and select Edit Distribution List
– Go to Distribution List Properties menu and configure who users can send to DL
The following is example that user iman@imanudin.net and admin@imanudin.net can be send to DL
Please try to send email to distribution list (from allow users and deny users) to ensure restriction have worked.
Good luck and hopefully useful
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