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Whitelist Blacklist Sender

By: zetalliance

Sender Blocker

created by: ccs.uoguelph modified by : Cloud-Temple Grand Ouest maintained by: Zeta Alliance

Tested on 8.8.15 patch 22

What is it ?

SenderBlocker allows Zimbra users to block or allow incoming mails from given adresses and/or domains. The zimlet acts as a shortcut to the account Black/WhiteList, therefore revolves around Zimbra's blacklisting function.

To make use of this zimlet

  • Select one or more messages.
  • Right-click to open the context menu.
  • Select the option to either allow or block the sender(s) or sender's domain(s).

The sender(s) email address will be added to the corresponding list (You may need to refresh the browser in order for the changes to show up in the Preferences panel).

How to retrieve the list of blacklisted/whitelised senders

Via the CLI for now:

  zmprov ga user@example.com amavisBlacklistSender
  zmprov ga user@example.com amavisWhitelistSender


  su zimbra
  cd /tmp
  wget https://github.com/Zimbra-Community/com_cloudtemple_senderblocker/releases/download/1.0.1/com_cloudtemple_senderblocker.zip
  zmzimletctl deploy com_cloudtemple_senderblocker.zip

Then go to the Admin Console and make sure to enable the Zimlet, Configure -> Class Of Service -> default (or any cos you want) -> Zimlets -> comcloudtemplesenderblocker and check Available and Enabled.

Download View on GitHub

Rating ( 5 ratings )
Downloads 4547
Latest Version 1.0.1b
Categories Business , Mail , Organization
Compatibility ZCS 8.7.x , ZCS 8.8.x
License Apache License v2.0
Created on 2/20/17
Updated on 6/20/21


  • Stopped working for Zimbra 8.8.15_GA_3996.FOSS 

    By: GlobalAdvisorsIT on on 4/5/21 for version 1.0.1b

    Loved the plugin.

    Disappeared under this version and install results in error

    • This functionality has been added to the core product in Zimbra 9 Modern UI 

      Replied on 7/3/21

    • Tested on Tested on 8.8.15 patch 22, zmcontrol -v Release 8.8.15.GA.3869.UBUNTU18.64 UBUNTU18_64 FOSS edition, Patch 8.8.15_P22. Zimbra 8.8.15_GA_4026 (build 20210416084316) And it still works, maybe you have a cache issue, install steps added to Github.  

      Replied on 6/20/21

  • Thank You 

    By: ibrahimayhans on on 5/12/20 for version 1.0.1b

    A very nice plugin that can be used and preferred,
    My Version 8.8.15 FOSS

  • Does not work 

    By: julianodls on on 2/11/19 for version 1.0.1b


    I am not seeing how to install please send more details so I install zimbra 8.8.11

    • please try again, updated the download link  

      Replied on 2/7/20

  • I can not install 

    By: wauters on on 11/2/18 for version 1.0.1b

    I can not install, it says there is no description.

    • please try again, updated the download link 

      Replied on 2/7/20

  • Donwload not working 

    By: NothingCtrl on on 3/15/18 for version 1.0.1b

    Github error 404 page

    • download link updated! Thanks. 

      Replied on 2/7/20