RBL (real-time block list)A database of Internet Protocol (IP) addresses of sources that have been verified as being unsolicited commercial e-mail (also known as spam).
recipientAn Active Directory object that is mail-enabled, mailbox-enabled, or that can receive e-mail messages.
recipient policyA policy that is applied to mail-enabled objects to generate e-mail addresses. Recipient policies can be defined to apply to thousands of users, groups…
Recipient Update ServiceAn Exchange Server 2003 service that updates the recipient objects within a domain with specific types of information.
replicasA copy of a public folder that contains all of the folder's contents, permissions, and design elements, such as forms behavior and views.
resourceData, metadata, a collection of data, or a collection of metadata accessed as a content item. Examples: a document, a database table, a content class.
reverse proxy serverA reverse proxy server is similar to a regular proxy server used for outbound network traffic except that it relays connection requests for inbound…
routing groupA collection of Servers running Exchange 2000 that can transfer messaging data to one another in a single-hop without going through a bridgehead.
Routing serviceA component in Exchange 2000 that builds link state information. [Exchange 2000]
RPC (remote procedure call)A message-passing facility that allows a distributed application to call services that are available on various computers on a network.