AfterLogic XMail Server options like protocols management, logs management, control accounts/admins management, and other server-oriented options on XMail system-level.
You can change any of listed values by editing the appropriate fields at right of the parameters. You can also disable the parameters by unchecking checkboxes at left.
If you are done with your changes, just click on 'Save' button to commit the changes. The mail server immediately honors this and handles your mails accordingly.