With access to a web-based portal, or by uing their native email client, users can self-administer their spam filter without the need to ask IT support for help. This allows helpdesk staff to focus on more complex issues which take longer to fix or that have a higher priority.
In turn users are kept happy because they can service themselves without having to wait around for a member of the helpdesk team. On the off chance that an important email gets stuck in a spam filter, users can address this and release it without delay.
The result is a double boost in productivity to users and IT support staff, who can focus on more important tasks.