The Options page of the Web-based Administration utility is primarily made up of check boxes, which govern whether certain optional features are enabled or disabled. An extra field is available if the option requires additional information (such as Use ESMTP Size). Click Save when you are finished configuring your options, then stop and restart SLmail to ensure that the changes take effect.
Note: No change you make in SLmail option settings will take effect until SLmail is restarted.