Glossary of terms
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## Glossary of terms

CalDAV

  CalDAV is an extension of the WebDAV interface for exchange of calendar data. It can be used for synchronization of calendars between your client and server, scheduling of meetings with assistance of the Free/Busy server and delegating of calendars to other Kerio MailServer users.

DNS

  DNS (Domain Name System) is a distributed database service used to convert domain names into corresponding IP addresses.

Email address

  An email address determines the sender and recipient of a message in electronic communication. It consists of a local part (before the `@` character) and a domain part (after the `@` character). A domain specifies where email will be delivered to (a company), a local part specifies a particular recipient within this domain.

HTML

  HTML (HyperText Markup Language) is a markup language used for development of web pages published in the Internet.

HTTP(S)

  HTTP (Hypertext Transfer Protocol) is a simple application protocol used during transfer of files and images. HTTPS is an SSL-encrypted version of this protocol.

iCalendar

  iCalendar (iCal) is a standard for exchange of calendar data. If this standard is supported by an email or calendar client, calendars can be published on any server with the WebDAV interface (e.g. in a Kerio MailServer's mailbox). Apart from calendar publishing, it is also possible to use the reversed method to subscribe calendars published on such servers in your clients.

IMAP

  Internet Message Access Protocol (IMAP) enables clients to manage messages stored on a mail server without downloading them to a local computer. This architecture allows the user to access his/her mail from multiple locations (messages downloaded to a local computer would not be available from other locations).

IP address

  A unique 32-bit number that identifies a computer in the Internet or intranet.

JavaScript

  JavaScript is a programming language used for creating web pages.

LDAP

  LDAP (Lightweight Directory Access Protocol) is an Internet protocol used to access directory services. Information about user accounts and user rights, about hosts included in the network, etc. are stored in the directories. Typically LDAP is used by email applications to search for email addresses and to delivery management (Microsoft Active Directory).

Mailbox Account

  A place where email is stored on a server. Clients can download emails from an account (using POP3 protocol) or work with messages directly at the server (using IMAP or WebMail).

  The account is physically represented by a directory on a disk. The directory is created in the Kerio MailServer directory (`mail/domain/username`). Other subdirectories representing individual folders are created in this directory.

  Mailboxes are not created during the definition of users; the specific mailbox is created upon the first login to the mailbox.

Notifications

  Short message (notification) about a particular event — e.g. new email. It is usually sent as a text message (SMS) to a cellular phone.

POP3

  POP3 (Post Office Protocol version 3) is an Internet protocol that allows a client to download mail from a server and store it on the local computer. It is suitable for clients who don't have a permanent connection to the Internet.

Port

  16-bit number used by TCP and UDP for application (services) identification on a given computer.

SMTP

  SMTP (Simple Mail Transfer Protocol) is used for sending email between mail servers. The SMTP envelope identifies the sender/recipient of an email.

Spam

  Unwanted, usually advertisement email. Spam are usually sent in bulk and the recipient addresses are obtained by illegal means.

SSL

  A protocol used to secure and encrypt the TCP connection. Secure Socket Layer was originally designed by Netscape to secure transmission of web pages using HTTP protocol. Today it is supported by almost all standard internet protocols — SMTP, POP3, IMAP, LDAP, etc.

  At the beginning of communication, an encryption key is requested and transferred using asymmetrical encryption. This key is then used to encrypt (symmetrically) the data.

  A security protocol for the encrypted transfer of the data in the Internet (used in HTTPS).

TLS

  Transport Layer Security is the successor to SSL (version 3.1), which is used for encryption of data over networks. This version is approved by the IETF and it is accepted by all the top IT companies (i.e. Microsoft Corporation).

URL

  URL (Unique Resource Locator) is a subset of URI, which uniquely describes the location of a specific file in a computer network.

WebDAV

  Using WebDAV (Web Distributed Authoring and Versioning), users can group-edit and organize files located on servers.

WWW

  World Wide Web (the abbreviation WWW or web) is currently the most popular service offered in the Internet. It allows transferring multimedia files (texts, sounds, images).

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