There's a python script which grants permissions to your Dovecot and Postfixdatabase users...code-block::consoleuser@host:~$ python/path/to/vmm-0.6.0/pgsql/set-permissions.py-hUsage: set-permissions.py OPTIONSSet permissions for Dovecot and Postfix in the vmm database.Options: -h, --help show this help message and exit -a, --askpass Prompt for the database password. -H HOST, --host=HOST Hostname or IP address of the database server. Leave blank in order to use the default Unix-domain socket. -n NAME, --name=NAME Specifies the name of the database to connect to. Default: mailsys -p PASS, --pass=PASS Password for the database connection. -P PORT, --port=PORT Specifies the TCP port or the local Unix-domain socket file extension on which the server is listening for connections. Default: 5432 -U USER, --user=USER Connect to the database as the user USER instead of the default: root -D USER, --dovecot=USER Database user name of the Dovecot database user. Default: dovecot -M USER, --postfix=USER Database user name of the Postfix (MTA) database user. Default: postfixuser@host:~$ python/path/to/vmm-0.6.0/pgsql/set-permissions.py-a-H127.0.0.1-UvmmPassword: user@host:~$