Administrator's Guide - Kerio Software Archive

Chapter 1Introduction1.1 Basic featuresKerio MailServer 6.5 is designed as a “secure mail server accessible from anywhere”. Here isa brief list of its main functions and features.SMTP serverA full-featured SMTP server which allows multiple independent local domains, virtualaddresses (aliases), to receive email via ETRN, etc. Outgoing email can be sent eitherdirectly to target domains (according to MX records in DNS) or via a parent SMTP server(e.g. the ISP’s SMTP server).POP3 serverPOP3 (Post Office Protocol version 3) is an Internet protocol that allows a client to downloadmail from a server and store it on the local computer. It is suitable for clients whodon’t have a permanent connection to the Internet.Unlike Internet Message Access Protocol (IMAP), POP3 does not allow users to manipulatemessages at the server. Mail is simply downloaded to the client where messages aremanaged locally. POP3 provides access only to a user’s INBOX; it does not support accessto public folders.IMAP serverIMAP4 (Internet Message Access Protocol version 4) is an Internet messaging protocol thatenables a client to access email on a server rather than downloading it to the user’s 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).It is possible under certain conditions to access the email account using both IMAP andPOP3 protocols.NNTP serverNNTP (Network News Transfer Protocol) is a protocol used to transfer news messages anddisplay public news folders for users. An NNTP server stores archives of all newsgroupposts.Web Interface (Kerio WebMail)The built-in HTTP server allows remote access to the user account. It allows readingand writing of email messages, events and tasks, folder management and modificationsof personal settings. No email client software needs to be installed and no settings areneeded. All the user needs is a web browser. Kerio WebMail is address in a stand-alonedocument, Kerio MailServer, User’s Guide.9