Back pressureA pressure that can cause water to backflow into the water supply when a user's water system is at a higher pressure than the public water system.
backboneThe bones, muscles, tendons, and other tissues that reach from the base of the skull to the tailbone.
backoffIn Exchange Server 2007, a mechanism used to deliver messages at an interim hop along the least cost routing path when direct relay fails for any reason…
BadMail folderThe BadMail folder contains messages that cannot be delivered to your organization, and also cannot be returned to the sender.
Base64It is a method of encoding arbitrary binary data as ASCII text. This is necessary for sending files via Internet email, which can only handle 7-bit ASCII…
Basic authenticationAuthentication protocol supported by most Web servers and browsers. Transmits the user name and password in clear text.
BCCA Bcc (blind carbon copy) is a copy of an email message sent to a recipient whose email address does not appear in the message.
Bcc journalingBcc journaling is message-only journaling with the added ability to capture the Bcc recipients.
BifurcationA split in the delivery path of an e-mail message, which is sent to multiple recipients, so that the different recipients receive different copies of the…
binary tree server topologyConnects servers in a pyramid fashion: the top server connects to two servers below it, each of which connects to two servers below it, and so on.
Black ListBlock email from email addresses and domains added to this list.
BlacklistA Blacklist collects known sources of spam. Email traffic then can be filtered against a blacklist to remove spam.
Block phraseA custom word or phrase that the administrator sets for the Content Filter agent to prevent e-mail messages that contain specific words or phrases from…
BlogBlogs, also referred to as Web logs, are frequent, chronological Web publications consisting of links and postings.
BodyThe main part of an email message containing the actual, arbitrary data such as text or images.
bookmarkA link to a Web site or page previously visited.
bookmark folderA folder in the Bookmark Bar containing bookmarks.
bounce messageA non-delivery receipt that is sent to an e-mail sender when a message cannot be delivered to the intended recipient temporarily or permanently.
boundThe upper or lower limit in a permitted range of values. [Exchange 2007]
bridgehead serverA nominated server that acts as a message transfer point between Exchange 2000 routing groups.
broadcast meetingInvitees are notified about a meeting but do not need to respond to the invitation.
BrokenOne of four health states of a storage group copy. Broken indicates that the system has detected a condition that prevents replication and replay.
BrowserAn application, such as Internet Explorer or Netscape Navigator, used to view and navigate the World Wide Web and other Internet resources.
ButtonA white acrylic disk that indicates the (nominal) dealer. Also used to refer to the player on the button. Example: "Oh, the button raised."
button barIn the Notes client, the bar that displays actions as buttons. Actions let users click to accomplish tasks, from mimicking the Notes menus to tasks…