You must run the Web service on the Mail server to allow users to modify their server-side mail rules and vacation messages. Once both Web and Mail services are enabled, an administrator needs to enable the following settings in the web service:
- In Server Admin -> Web -> Sites -> (select your site) -> Security, turn on SSL and pick a certificate, then save. (For detailed information about certificates and their management, see the Advanced Server Administration guide.
- In the Web Services tab, enable "configure server-side mail rules".
Mail rules only work for real users that have access to the Mail service. If controlled via SACLs, they should be enabled to access this service.