The options on this template screen correspond to the options located on the Account Editor's Mail Services screen. When a template is set to control this screen, it will control the Mail Services options for any account belonging to a Group that utilizes the template.
Mail Services
Enable POP access (Post Office Protocol)
When this box is checked, accounts with settings controlled by this template can be accessed via Post Office Protocol (POP). Virtually all email client software supports this protocol. Clear this checkbox if you do not wish to allow POP access.
...but only from LAN IPs
Check this box if you wish to allow accounts to be accessed via POP only when the user is connecting from a LAN IP address.
Enable IMAP access (Internet Message Access Protocol)
When this box is checked, accounts with settings controlled by this template can be accessed via Internet Message Access Protocol (IMAP). IMAP is more versatile than POP, allowing email to be managed on the server and accessed using multiple clients. Most email client software supports this protocol.
...but only from LAN IPs
Check this box if you wish to allow accounts to be accessed via IMAP only when the user is connecting from a LAN IP address.
...enable MDaemon Connector access (requires IMAP)
This option is only available on the New Accounts template. Click this option if you wish to allow the account to connect using MDaemon Connector. Note: this option will only be available when support for MDaemon Connector is activated on your server.
Restrict SMTP access to LAN IPs only
Check this box if you wish to restrict SMTP access to LAN IPs only. This will prevent accounts from sending mail unless they are connected to your network. If the account tries to send mail from an outside IP address the connection will be refused and dropped.
Enable ActiveSync access
This option is only available on the New Accounts template. Check this box if you wish to allow new accounts to use ActiveSync on a mobile device to synchronize email, contacts, calendar, and other data with MDaemon/Webmail. This setting corresponds to the Enable ActiveSync services for this user option located on the Account Editor's ActiveSync for MDaemon screen.
Apply to all accounts now
This option is only available on the New Accounts template. Click this button to apply this screen's settings immediately to the Mail Services and ActiveSync for MDaemon screens of all existing MDaemon accounts.
See:
Account Editor » Mail Services