Grant Access by IP Address, Subnet, or Domain
If you have a small number of clients who use the IMAP4 service, you can create an exclusive group of computers that can access only the server. Computers that have access to the service can be identified by IP address, subnet mask, or domain name.
Identify a permitted computer by IP address only if you assign IP
addresses statically. If a
To grant access by IP address, subnet, or domain:
Tip If you know only the name of the computer, click DNS Lookup. Type the name of the computer, and then click OK. If resolved, the IP address appears in IP address automatically.
Note By default, IMAP4 virtual servers grant all computers access to Exchange resources such as public folders and mailboxes. If you create groups of permitted users for one IMAP4 virtual server, the list applies only to that one IMAP4 virtual server. To limit access to other IMAP4 virtual servers, you must add groups of computers to all IMAP4 virtual servers.