In the electronics industry, the function and the connector his scope has a different classification. If need in groups or by the particular geographical area of particular connector access control, can choose the following two options: the use of connectors scope limits the use of connector. By definition, only certain routing group of the user to be able to use by the group we connector. But, can also be for another connector (such as SMTP connectors) designated routing group scope, so that only certain routing users can use the group of the SMTP connector. If you want to ensure that a particular location users always use the SMTP connectors, deal with SMTP connector use routing group scope. Can use property transfer limit connector "TAB to limit access to any type of connector. Can specify clearly have the access to distribution of connector, also can be clearly specified refused to visit the connector distribution lists. To illustrate the routing group topology and connectors scope to effect the mail, assume that there is a flow called Contoso king-cord Co., Contoso.com). (the company, this company in the United States only have two main office, a in Colorado, another in Maine. All servers have through the high-speed Internet connection, but each site in fax connectors and SMTP connector. If the fax connectors have the organization the scope of a range, the Colorado user can use Maine fax connectors, but will have a long distance call charges. In addition, the administrator of the Maine Contoso hope all users use in Maine and connected to the Internet site of connector, and Colorado SMTP all users using the local SMTP connectors and fax the connector. Contoso.com topology. In this topology, each site has the following connectors: connected to the Internet and has a routing group scope SMTP connector. Has the routing group scope fax connector. Routing group connectors, allow routing group of the servers are any through this connector send mail, and the remote sites all three server has designated as a remote server. The bridge Since each site of all servers have share the same network connection, so it is necessary to put them all, so that the bridge server designated as the server can through a point to point the way of communication. Use transfer limit to limit use. Can only be a particular set of users use your connectors. Use relay to limit the use of the advantages of the limit is: use this option will not need to create routing group. Restriction on the use of weakness is: through the connector for sending each email, they had to be expanded in the selected each form, in order to enforce this limit. The unfolding of from the performance measure is very expensive. Accordingly, the proposal is only in distribution is small or make sure users can accept the impact on performance, just use the transfer limit "connector" TAB. Understand the role of the connector and scope, is we better use, also better exploit market.