$command_mail_restrictions defines who can use command mail. By default user registerd as a poster can use command mail. To enable that anyone can use command mail, set
command_mail_restrictions = permit_anyone
command_mail_restrictions = reject_system_accounts permit_anyone
command_mail_restrictions = reject
There are other methods to disable command mail. See the Section called Case Study: Disable Command Mail for more details.
Copyright (C) 1993-2017 Ken'ichi Fukamachi mail:< fukachan at fml.org >