Zimbra Collaboration Suite 7.0
Zimbra Collaboration Suite 7.0
Administrator's Guide
Open Source Edition


Appendix D Glossary

Appendix D Glossary
The Glossary lists terms and acronyms used in this document, and includes both industry terms and application-specific terms. If a general industry concept or practice has been implemented in a specific way within the product, that is noted as well.
A record
A (Address) records map the hostname to the numeric IP address. For zimbra, the A record is the IP address for the zimbra server.
Account Policy
Class of Service as exposed in Zimbra administration console.
AD
Microsoft Active Directory Server. Used in Zimbra as an optional choice for authentication and GAL, along with OpenLDAP for all other Zimbra functions.
Alias
An “also known as” email address, which should be routed to a user at a different email address.
Attribute
Contains object-related data for directory server entries. Attributes store information such as a server host name or email forwarding address.
Authentication
Process by which user-supplied login information is used to validate that user’s authority to enter a system.
Blacklist
Anti-spam term, indicates a known bad IP address. This could be one that has been hijacked by spammers, or also one from a poorly maintained but legitimate site that allows mail relaying from unauthorized parties.
BLOB
Binary Large Object.
Class of Service (COS)
Describes an object in the Zimbra LDAP data schema, which contains settings for things like user mail quotas. Each Zimbra account includes a COS, and the account inherits all the settings from the selected COS.
CLI
Command-Line Interface. Used to refer to the collective set of Zimbra command-line tools, such as zmprov.
Cluster
A type of network configuration for high availability, using clusters of servers (nodes). If one server fails or drops off the network, a spare takes over.
Contacts
Within Zimbra, Contacts are a user-interface feature listing that user’s personal collection of address and contact information.
Conversation
Within Zimbra, Conversations are a user-interface feature that presents email threads (emails sharing the same subject line) as a single Conversation listing. Users can expand the Conversation to view all emails within it.
DHTML
Dynamic HTML. A technology employed in the Zimbra Web Client.
DNS
Domain Name System is an Internet directory service. DNS is how domain names are translated into IP addresses and DNS also controls email delivery. Correctly configured DNS is required for Postfix to route messages to remote destinations
Edge MTA
Generic term used to refer to any mail transfer agent that is the first line of defense in handling incoming email traffic. Functions that may occur on the Edge MTA include spam filtering.
Entry
An item in the directory server, such as an account or mail host.
Failover
Takeover process where a spare server machine detects that a main server is unavailable, and the spare takes over processing for that server.
FQDN
Fully qualified domain name. The hostname and the path to the host. For example, www.Zimbra.com is a fully qualified domain name. www is the host, Zimbra is the second-level domain, and .com is the top level domain.
GAL
Global Address List, the Outlook version of a company directory. Lists contact information, including email addresses, for all employees within an organization.
Global Configuration
A Zimbra object containing default settings for servers and Class of Service.
High Availability
Abbreviated as HA, high availability refers to the availability of resources in a computer system in the wake of component failures in the system.
HTTP
HyperText Transfer Protocol, used along with SOAP for UI integration.
IMAP
Internet Message Access Protocol is a method of accessing mail from a remote message store as if the users were local.
Store
Within Zimbra, a directory area that stores all the indexing information for mail messages on a particular mailbox server.
Indexing
The process of parsing incoming email messages for search words.
Java
Java is an industry standard object-oriented programming language. Used for the core Zimbra application server.
JavaScript
Scripting largely developed by Netscape that can interact with HTML source code. Technology used in the Zimbra Web Client.
LDAP
Lightweight Directory Access Protocol, an industry standard protocol used for authentication.
Zimbra administration console
The Zimbra administrator interface.
Zimbra Web Client
The Zimbra end-user interface.
LMTP
Local Mail Transfer Protocol, used for transferring messages from Postfix MTA to the Zimbra server for final delivery.
Mailbox Server
Alternative term for Zimbra server.
MAPI
Messaging Application Programming Interface. A system built into Microsoft Windows to enable different email applications to work together.
Message Store
Within Zimbra, a directory area that stores the mail messages on a particular mailbox server.
MDA
Mail Delivery Agent, sometimes known as a mail host. The Zimbra server functions as an MDA.
Metadata
Data that describes other data, rather than actual content. Within Zimbra, metadata consists of user folders, threads, message titles and tags, and pointers.
MIME
Multipurpose Internet Mail Extensions, a specification for formatting non-ASCII Internet message content such as image files. Format used to store messages in Message Store.
MTA
Message Transfer Agent. MTA is a program that delivers mail and transports it between machines. A Zimbra deployment assumes both the Postfix MTA and an edge MTA.
MX Record
Mail eXchange. An MX record is an entry in a domain name database that identifies the mail server that is responsible for handling emails for that domain name. The email system relies on DNS MX records to transmit emails between domains. When mail is processed, the MX record is checked before the A record for the destination address.
OOTO
Common shorthand for “out of the office”, used when sending vacation messages.
Open Source
Refers to software created by groups of users for non-commercial distribution, where source code is published rather than proprietary.
OS
Operating system, such as Linux, UNIX, or Microsoft Windows.
POP
Post Office Protocol is used to retrieve email from a remote server over TCP/IP and save it to the local computer.
Provisioning
The process of creating accounts or other data, usually in batch or automated fashion.
RBH
Real-time black hole. Usually refers to web sites that, as a public service, provide lists of known bad IP addresses from which mail should be blocked, because the servers are either known to be spammers, or are unsecured and exploited by spammers.
Redo Logs
Detailed transaction log for the Zimbra server, used for replay and replication.
SAN
Storage Array Network. A high-availability data storage area.
Schema
Describes the data structures in use for by directory services at a particular organizational site.
SMTP
Simple Mail Transfer Protocol. Used in Zimbra deployments between the Edge MTA and the Postfix MTA.
SNMP
Simple Network Monitoring Protocol. Used by monitoring software to pick up critical errors from system logs.
SOAP
Simple Object Access Protocol, an XML-based messaging protocol used for sending requests for Web services. The Zimbra servers use SOAP for receiving and processing requests, which can come from Zimbra command-line tools or Zimbra user interfaces.
Spam
Unsolicited commercial email. Spammers refer to their output as “bulk business email”.
SQL
Structured Query Language, used to look up messages in the Message Store.
SSL
Secure Sockets Layer.
Tags
A Zimbra Web Client feature. Users can define tags and apply them to mail messages for searching.
TCO
Total Cost of Ownership. Zimbra reduces total cost of ownership (TCO) by reducing requirements for server hardware, OS licensing fees, supporting application license fees, disk storage requirements, and personnel (IT, help desk, consulting).
TLS
Transport Layer Security.
UCE
Unsolicited commercial email, also known as spam.
Virtual Alias
A type of mail alias recognized in the Postfix MTA.
Whitelist
Anti-spam term for a known good mail or IP address. Mail coming from such an address may be “automatically trusted”.
XML
eXtended Markup Language.