Convenient and easy creation of mailbox shares and other stuff to get family mailbox like features
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LICENSE Update Apr 10, 2018

Zimbra Shared Mailbox Toolkit

If you find Zimbra Shared Mailbox Toolkit useful and want to support its continued development, you can make donations via:

Demo video:

Do you have generic mailboxes for you sales department, helpdesk or, use Zimbra Shared Mailbox Toolkit to share those mailboxes with your staff. For long time Zimbra users: this toolkit is meant to bring back family mailboxes to Zimbra 8+.

By default shares are created with SendAs rights and read/write access (rwixd). This allows the user to email on behalf of the shared account and sent mail will be go to the shared account sent folder. An outgoing mail filter and persona is set to achieve this.

Designed for Zimbra version 8.7.11 and 8.8.

Bugs and feedback:

Report security issues to (PGP fingerprint: 97f4694a1d9aedad012533db725ddd156d36a2d0)


Install prerequisites

  • No special requirements


Use the automated installer:

wget -O /tmp/
chmod +rx /tmp/


Screenshot of Admin Zimlet and extension

No need to have CLI access to create/revoke root shares. alt tag

Screenshot of Client Zimlet

The client Zimlet will automatically expand the shared mailbox, so the Inbox is displayed instead of No results found. alt tag The client Zimlet will not show duplicated options when selecting FROM address. alt tag

Screenshot of additional header

Optionally an additional header is added to the email to identify the user sending email from a shared mailbox. For example it can help finding out what sales person was sending out mail from The header can be set via the installer or running su - zimbra -c "zmprov mcf zimbraSmtpSendAddAuthenticatedUser TRUE" and u - zimbra -c "zmmtactl restart". alt tag

Screenshot of the installer

alt tag

CLI Commands

Installed in /usr/local/sbin an can be run as user zimbra:

  • subzim: Share an entire mailbox with another mailbox (root share).
  • unsubzim: Revoke share created by subzim command (revoke root share).
  • personagen: Generate personas/identities for all aliasses of an account.
  • removeshares: Revoke all shares from an account. One can use this for managing people going into a different department, or in case the web UI fails to load due to sharing bugs.
  • submachinegun: Use this in case you are missing folders in your shared account. Read in-script comments for more details.

Enable the Admin Zimlet for delegated admins

zmprov ma +zimbraAdminConsoleUIComponents zimbraClientUploadView
zmprov grr global usr adminConsoleClientUploadRights
zmprov fc all


Copyright (C) 2015-2018 Barry de Graaff Zeta Alliance and the _addSendAsOrSendOboAddresses patch by Michele Olivo ZeXtras

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see