Sender right restriction Zimbra8 via Milter Service

Specially for Zimbra 8

The Zimbra milter allows for the regulation of distribution list senders on a Global or server level. When the milter server is enabled, only users who have been granted explicit sending permissions will be allowed. Enabling the Milter Server

    Global: Home > Configure > Global Settings > MTA > Milter Server

    Server: Home > Configure > Servers > Select Desired Server > MTA > Milter Server 

   Alternatively using the CLI: 

       # su - zimbra
       $ zmprov modifyConfig zimbraMilterServerEnabled TRUE

For a specific server (say eg.example.com):

       $ zmprov modifyServer eg.example.com zimbraMilterServerEnabled TRUE

The above steps will ensure that milter will be automatically started via "zmcontrol start"

To start the milter manually:

       $ zmmilterctl start

To check the status of the milter:

       $ zmmilterctl status 

Usage: zmmilterctl start|stop|restart|reload|refresh|status

   The following will provide examples for granting sender permissions on the CLI: 

   User - grants a user sending permissions to a distribution list 

       $ zmprov grr dl distributionlist@domain.com usr user@domain.com sendToDistList 
       $ zmprov grr dl all.staff@orientbell.com usr vijay.thakur@orientbell.com sendToDistList           

   After granting or revoking rights for the milter, you must reaload the configuration for the changes to take effect. 

         $ zmmtactl reload

Modifying and revoking grants

   If you want to remove or modify permissions, you'll need to use 'zmprov rvr' instead of 'zmprov grr'. 

   Example of removing sendToDistList permissions for a user: 

         $ zmprov rvr dl distributionlist@domain.com usr user@domain.com sendToDistList

   After granting or revoking rights for the milter, you must reaload the configuration for the changes to take effect. 

         $ zmmtactl reload

Reference : http://wiki.zimbra.com/wiki/Enabling_and_administering_the_Zimbra_milter

NOTE: Before doing the above exercise be ensure that distribution list must be exists. and let client add the member to that distribution list.