If the accounts domain is removed from “Email > Domains” page it is configured to be accessible from trusted clients only. In other words mail to xyz@mydomain.com is allowed from members of mydomain.com only.
See also:
If the accounts domain is removed from “Email > Domains” page it is configured to be accessible from trusted clients only. In other words mail to xyz@mydomain.com is allowed from members of mydomain.com only.
See also: