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Jason Meers - Getting started with EXIM Introduction |
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Jason Meers - Getting started with EXIM C1 |
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Jason Meers - Getting started with EXIM C2 |
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Jason Meers - Getting started with EXIM C3 |
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Jason Meers - Getting started with EXIM C4 |
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Jason Meers - Getting started with EXIM C5 |
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Jason Meers - Getting started with EXIM C6 |
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Jason Meers - Getting started with EXIM C7 |
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Start Here - If you're new to Exim |
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Beginners Guide
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If you are new to Exim the following section is for you. We cover the basic requirements and responsibilities for running your own mailservere... |
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Exim3 & Exim4 documentation |
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Beginners Guide
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Some of the problems on the Exim-Users mailing list are caused becuase people are using Exim3 documentation with Exim4 Servers. Exim4 was released in 2002. Exim4 replaces Exim3. |
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What is Exim? |
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Beginners Guide
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Exim is an MTA. A Simple Message Transport Protocol (SMTP) mail server.
Exim is highly configurable and has many powerful and advanced configuration options including the abiliy to store lists of users, hosts, domains etc. in simple text files, databases, Lightweight Directory Access Protocol (LDAP) directories and “callouts” to other programs or scripts on the same computer. Exim is common in large scale Unix/Linux environments and ISPs (Internet Service Providers), moving millions of messages per day, but is equally suitable for small networks or individual workstations. |
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What features are not provided by Exim? |
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Beginners Guide
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Exim is designed to move messages from one e-mail server to another and to deliver messages to local users mailboxes. Features such as POP3, IMAP, shared calendars, address books and group scheduling are not provided with Exim. Other programs are needed in addition to Exim if you want to provide the same kinds of “group-ware” functionality as GroupWise, Exchange and Lotus Notes. |
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Bounce messages |
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Beginners Guide
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In general terms, a “bounce“ message (strictly, a type of Delivery Status Notification or DSN) is generated when a delivery fails. In Exim, the bounce message would usually be sent back to the original sender to inform them that delivery had failed. |
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Retry |
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Beginners Guide
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Exim will usually try and deliver messages immediately (unless told otherwise). This works fine most of the time, however mail servers can often fail to accept messages during busy periods and may even be shut down for maintenance from time to time. |
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Frozen messages |
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Beginners Guide
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A “frozen” message is a message that has an error condition that is thought to be serious enough to justify “freezing” it in the queue and not performing any more attempts at delivery. |
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Queues |
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Beginners Guide
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The “queue” or “message queue” is a collection of e-mail messages Exim has under it's control. All messages go into the same queue regardless of who they are to or from. No message in the queue is any more important than any other.
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Transports |
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Beginners Guide
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Transports are used to perform the actual delivery of messages once accepted and processed by the routers before it. |
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Routers |
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Beginners Guide
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Exim uses routers to decide “what to do” with a message once it has been accepted by an earlier Access Control List. Routers are used to process messages and decide which deliveries are to take place. Each router is run in turn until a message is accepted for processing by a router. |
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Access Control Lists |
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Beginners Guide
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Access Control Lists (ACL's) provide a flexible way for Exim to check incoming messages. The most common use of ACL's is to check if the recipients of a message are valid (or allowed) BEFORE accepting the message from another host. ACL's are commonly used as a “first line of defence” against spam. |
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Aliases |
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Beginners Guide
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Some users will want to use more than one e-mail address, even though they have only a single mailbox. |
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Spam |
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Beginners Guide
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Spam is unsolicited or junk mail, sent without the recipients permission. The term was coined after the famous Monty Python comedy sketch set in a café which served every customer with the canned meat SPAM, even if the customer specifically asked not to receive any (just like modern junk e-mail). It is estimated that at any one time almost 80% of all e-mails being sent worldwide are spam. |
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E-mail standards |
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Beginners Guide
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The easiest way to view current e-mail standards is to read the RFC documents (Request For Comments) for each aspect of e-mail usage. 
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Relaying |
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Beginners Guide
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Relaying e-mail is like accepting a parcel for a friend. We know it is not addressed to us, but we are prepared to take it on someone else's behalf and pass it on to them. |
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A typical Exim configuration |
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Beginners Guide
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A typical Exim configuration might consist of a single file with configuration information for the following sections:
Global settings and configuration options
Access control settings and configuration
Queue settings and configuration
Router settings and configuration
Transport settings and configuration
Retry settings and configuration
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Tim Jackson - Spam and Virus Scanning |
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Beginners Guide
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This document briefly describes how to install and configure the following items of software, so that they work together to provide not only e-mail handling, but realtime spam and virus scanning: Exim 4.x (this version refers to 4.20+ but most parts are applicable to earlier versions of Exim 4) Exiscan/Exiscan-ACL (this document refers to Exiscan-ACL release 22+) SA-Exim (this document refers to version 3.0+) SpamAssassin Clam Antivirus/Sophos Antivirus/sophie
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Dan Shearer - POP3 vs IMAP Comparison |
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Beginners Guide
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POP vs IMAP for Inboxes Client-server email is still useful even in this day of massive public webmail. This note is for people interested in the POP and IMAP protocols used to access client-server email. There is an enduring myth that there is some circumstance in which POP is better than IMAP, whether for the user or the provider. So here's the answer! Read the full article... http://www.shearer.org/POP_vs_IMAP_for_Inboxes |
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Dan Shearer - Mail Server Comparison |
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Beginners Guide
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Mail Transfer Agents - Tool for the Job For a lot of people the choice of the Mail Transfer Agent is important. The wrong choice can mean lost time and money, lower reliability and increased risk to networks. Read the full article... http://www.shearer.org/MTA_Comparison |
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First International Exim Conference |
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Beginners Guide
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In 2005 UIT Cambridge and The UK Unix Users Group (UKUUG) organized the First International Exim Conference and Tutorial. More information and the papers presented at the conference can be found here: http://www.uit.co.uk/exim-conference/ |
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Beginners Guide