Privacy & Data Retention

How long does Zammad hold onto user data? How can I manage its user data retention behavior?

On-Premises Data

The following kinds of data are stored locally on the production system:

Tickets and users

By default, Zammad never automatically deletes tickets or users.

To enable automatic deletion of tickets after a given interval, use the scheduler.

To manually delete users and all their associated tickets (e.g. in compliance with a “Right to Forget” request under the GDPR), you can use the data privacy functions in the admin panel or use the console.

Chat sessions

Once a chat session has been marked closed, it is scheduled for automatic deletion 12 months later.

IP address logs for chat sessions can be manually deleted by following the directions here.

CTI caller log

The caller log shows only the 60 most recent entries. Each entry in the caller log is automatically deleted after 12 months.

Log files

Zammad writes log files to disk (typically under /opt/zammad/log/).

Package installations will set up a separate system utility called logrotate to rename and archive (or rotate) log files on a nightly basis and remove old logs after 14 days.

If installing from source, it is strongly recommended to configure logrotate or a similar log management utility; Zammad will not purge old logs on its own.

User sessions

Zammad maintains session information about every user currently logged in.

This information is automatically purged when a user logs out, and can be viewed or manually deleted via the admin panel (under System → Sessions). Users may also delete their own session information via the user preferences menu, under Device.

Session information includes IP address (and possibly geographic location), browser, time of original login, and time of last visit.

Data Privacy Tasks

Each entry in the data privacy task list is automatically deleted after 12 months.

External Services

Zammad utilizes third-party web services for certain functions, meaning that user data may occasionally be sent or exposed to third parties. These functions can be individually disabled in the admin panel under Settings → System → Services.


By default, the third-party services that Zammad relies on are mostly ones hosted and managed by the Zammad Foundation itself, but Zammad can be extended to interface with other services instead.

The source code for these third-party service integrations can be found here.


No private images or personally-identifying information are stored on

The Images service caches publicly-available images from sources like Gravatar and serves them to the Zammad application as user avatars and organization logos. These images are discovered using MD5 digests of user email addresses and organization domain names. User avatars are cached for 7 days; organization logos are cached for 30 days.


No user information is stored or cached on

As part of its service-level agreement (SLA) functionality, Zammad requires detailed, localized calendar information (e.g., to set the time zone and accommodate national holidays and daylight savings time). The GeoCalendar service is used to retrieve this information.


No user information is stored or cached on

One of Zammad’s security features is to track user sessions based on the user’s browser and country of origin. Suspicious login activity from a different browser or country may trigger Zammad to dispatch an alert email to the affected user. The GeoIP service is used to associate IP addresses to a geographic origin.


Zammad’s geolocation service relies on OpenStreetMap (OSM) unless you turned it off. If you provide an address (or parts of an address) in a user object, there is a lookup of coordinates from OSM which are stored in Zammad’s database. Have a look at their privacy policy for more information.