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You can use the provided script helper-scripts/ to backup mailcow automatically.

Please do not copy this script to another location.

To run a backup, write "backup" as first parameter and either one or more components to backup as following parameters. You can also use "all" as second parameter to backup all components. Append --delete-days n to delete backups older than n days.

# Syntax:
# ./helper-scripts/ backup (vmail|crypt|redis|rspamd|postfix|mysql|all|--delete-days)

# Backup all, delete backups older than 3 days
./helper-scripts/ backup all --delete-days 3

# Backup vmail, crypt and mysql data, delete backups older than 30 days
./helper-scripts/ backup vmail crypt mysql --delete-days 30

# Backup vmail
./helper-scripts/ backup vmail

The script will ask you for a backup location. Inside of this location it will create folders in the format "mailcow_DATE". You should not rename those folders to not break the restore process.

To run a backup unattended, define MAILCOW_BACKUP_LOCATION as environment variable before starting the script:

MAILCOW_BACKUP_LOCATION=/opt/backup /opt/mailcow-dockerized/helper-scripts/ backup all


You can run the backup script regularly via cronjob. Make sure BACKUP_LOCATION exists:

5 4 * * * cd /opt/mailcow-dockerized/; MAILCOW_BACKUP_LOCATION=/mnt/mailcow_backups /opt/mailcow-dockerized/helper-scripts/ backup mysql crypt redis --delete-days 3

Per default cron sends the full result of each backup operation by email. If you want cron to only mail on error (non-zero exit code) you may want to use the following snippet. Pathes need to be modified according to your setup (this script is a user contribution).

This following script may be placed in /etc/cron.daily/mailcow-backup - do not forget to mark it as executable via chmod +x:


# Backup mailcow data

set -e

export MAILCOW_BACKUP_LOCATION="/opt/backup"
PARAMETERS="backup all"
OPTIONS="--delete-days 30"

# run command
set +e

if [ $RESULT -ne 0 ]
            echo "${SCRIPT} ${PARAMETERS} ${OPTIONS} encounters an error:"
            echo "RESULT=$RESULT"
            echo "STDOUT / STDERR:"
            cat "$OUT"