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).
Receive connectorA connector that is used to receive mail from remote mail systems based on administrator-defined address spaces.
recipientAn Active Directory object that is mail-enabled, mailbox-enabled, or that can receive e-mail messages.
Recipient Block listAn administrator-defined list of recipients for which mail coming in from the Internet should never be accepted. [Exchange 2007]
remote delivery queueA group of temporary queues that hold messages that are being delivered to a remote destination by using SMTP.
remote device wipeA technology that enables the Exchange server to set a mobile device to erase all data the next time the device connects to the Exchange server.
Replay SuspendOne of four health states of a storage group copy. Replay Suspend indicates that an administrator has temporarily halted log replay. [Exchange 2007]
replica seederAlso known as seeder, the replica seeder is an internal component that is responsible for seeding the passive copy for storage groups that are enabled for…
Replication IDA 16-byte value generated from the unique identifier on a device, the current date and time, and a sequence number.
Resource Booking AttendantA calendaring feature that automatically manages resources. Resource requests are automatically accepted or denied depending on availability and policies.
Resource mailboxA mailbox that is associated with a resource instead of a user (such as a conference room for reservation purposes). In Exchange 5.
RFC (Request for Comments)An official document of the Internet Engineering Task Force (IETF) that specifies the details for protocols included in the TCP/IP family. [Exchange 2007]
room mailboxA room mailbox is a type of resource mailbox that is assigned to a meeting location such as a conference room, auditorium, or training room.
round robinA simple mechanism used by DNS servers to share and distribute loads for network resources.
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 group connectorAn SMTP connector that is required for mail to flow between Exchange routing groups.
RSG (recovery storage group)A special storage group that enables you to mount a mailbox database, extract data from the mounted database, and then either copy the extracted data to a…
RTAudioAn advanced speech codec that is designed for real-time two-way Voice over IP (VoIP) applications such as gaming, audio conferencing, and wireless…
Rulean authoritative direction for conduct or procedure.
rule collectionAn ordered set of rules for the purpose of implementing a messaging policy. The number of rule collections is set at design time. [Exchange 2007]