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| Preface | |
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| Introduction | |
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| How Internet Mail Works | |
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| Different Types of MTA | |
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| Internet Message Standards | |
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| RFC 822 Message Format | |
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| The Message "On the Wire" | |
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| Summary of the SMTP Protocol | |
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| Forgery | |
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| Authentication and Encryption | |
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| Routing a Message | |
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| Checking Incoming Mail | |
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| Overview of the DNS | |
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| DNS Records Used for Mail Routing | |
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| Related DNS Records | |
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| Common DNS Errors | |
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| Role of the Postmaster | |
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| Exim Overview | |
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| Exim Philosophy | |
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| Exim's Queue | |
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| Receiving and Delivering Messages | |
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| Exim Processes | |
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| Coordination Between Processes | |
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| How Exim Is Configured | |
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| How Exim Delivers Messages | |
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| Local and Remote Addresses | |
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| Processing an Address | |
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| A Simple Example | |
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| Complications While Directing and Routing | |
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| Complications During Delivery | |
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| Complications After Delivery | |
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| Use of Transports by Directors and Routers | |
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| Exim Operations Overview | |
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| How Exim Identifies Messages | |
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| Watching Exim at Work | |
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| The Runtime Configuration File | |
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| The Default Qualification Domain | |
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| Handling Frozen Bounce Messages | |
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| Reducing Activity at High Load | |
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| Limiting Message Sizes | |
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| Parallel Remote Delivery | |
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| Controlling the Number of Delivery Processes | |
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| Large Message Queues | |
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| Large Installations | |
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| Extending the Delivery Configuration | |
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| Multiple Local Domains | |
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| Virtual Domains | |
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| Mailing Lists | |
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| Using an External Local Delivery Agent | |
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| Multiple User Addresses | |
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| Mixed Local/Remote Domains | |
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| Delivering to UUCP | |
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| Ignoring the Local Part in Local Deliveries | |
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| Handling Local Parts in a Case-Sensitive Manner | |
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| Scanning Messages for Viruses | |
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| Modifying Message Bodies | |
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| Options Common to Directors and Routers | |
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| Conditional Running of Routers and Directors | |
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| Changing a Driver's Successful Outcome | |
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| Adding Data for Use by Transports | |
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| Debugging Directors and Routers | |
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| Summary of Director/Router Generic Options | |
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| The Directors | |
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| Conditional Running of Directors | |
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| Optimizing Single-Level Aliasing | |
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| Adding Data for Use by Transports | |
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| The aliasfile and forwardfile Directors | |
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| The aliasfile Director | |
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| The forwardfile Director | |
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| The localuser Director | |
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| The smartuser Director | |
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| The Routers | |
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| Timeouts While Routing | |
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| Domains That Route to the Local Host | |
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| The lookuphost Router | |
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| The domainlist Router | |
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| The ipliteral Router | |
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| The queryprogram Router | |
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| The Transports | |
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| Options Common to All Transports | |
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| The smtp Transport | |
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| Environment for Local Transports | |
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| Options Common to the appendfile and pipe Transports | |
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| The appendfile Transport | |
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| The pipe Transport | |
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| The lmtp Transport | |
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| The autoreply Transport | |
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| Message Filtering | |
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| Examples of Filter Commands | |
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| Filtering Compared with an External Delivery Agent | |
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| Setting Up a User Filter | |
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| Setting Up a System Filter | |
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| Testing Filter Files | |
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| Format of Filter Files | |
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| Significant Actions | |
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| Filter Commands | |
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| The add Command | |
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| Delivery Commands | |
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| Mail Commands | |
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| Logging Commands | |
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| The testprint Command | |
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| The finish Command | |
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| Obeying Filter Commands Conditionally | |
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| Additional Features for System Filters | |
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| Shared Data and Exim Processes | |
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| Message Files | |
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| Locking Message Files | |
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| Hints Files | |
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| Log Files | |
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| User and Group IDs for Exim Processes | |
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| Process Relationships | |
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| The Daemon Process | |
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| Reception Processes | |
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| Queue Runner Processes | |
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| Delivery Processes | |
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| Summary of Message Handling Process Types | |
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| Other Types of Process | |
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| Delivery Errors and Retrying | |
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| Retrying After Errors | |
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| Remote Delivery Errors | |
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| Local Delivery Errors | |
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| Routing and Directing Errors | |
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| Retry Rules | |
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| Computing Retry Times | |
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| Using Retry Times | |
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| Retry Rule Examples | |
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| Timeout of Retry Data | |
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| Long-Term Failures | |
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| Ultimate Address Timeout | |
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| Intermittently Connected Hosts | |
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| Message Reception and Policy Controls | |
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| Message Sources | |
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| Message Size Control | |
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| Messages from Local Processes | |
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| Unqualified Addresses from Remote Hosts | |
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| Checking a Remote Host | |
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| Checking Remote Sender Addresses | |
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| Checking Recipient Addresses | |
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| Checking Header Line Syntax | |
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| Relay Control | |
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| Customizing Prohibition Messages | |
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| Incoming Message Processing | |
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| Rewriting Addresses | |
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| Automatic Rewriting | |
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| Configured Rewriting | |
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| Rewriting Rules | |
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| Rewriting Patterns | |
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| Rewriting Flags | |
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| A Further Rewriting Example | |
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| Testing Rewriting Rules | |
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| Authentication, Encryption, and Other SMTP Processing | |
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| SMTP Authentication | |
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| Encrypted SMTP Connections | |
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| SMTP over TCP/IP | |
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| Local SMTP | |
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| Batched SMTP | |
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| File and Database Lookups | |
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| Single-Key Lookup Types | |
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| Query-Style Lookup Types | |
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| Quoting Lookup Data | |
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| NIS+ | |
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| LDAP | |
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| MySQL and PostgreSQL | |
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| DNS Lookups | |
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| Implicit Keys in Query-Style Lookups | |
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| Temporary Errors in Lookups | |
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| Default Values in Single-Key Lookups | |
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| Partial Matching in Single-Key Lookups | |
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| Lookup Caching | |
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| String Expansion | |
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| Variable Substitution | |
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| Header Insertion | |
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| Operations on Substrings | |
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| Character Translation | |
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| Text Substitution | |
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| Conditional Expansion | |
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| Lookups in Expansion Strings | |
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| Extracting Fields from Substrings | |
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| IP Address Masking | |
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| Quoting | |
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| Reexpansion | |
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| Running Embedded Perl | |
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| Testing String Expansions | |
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| Domain, Host, and Address Lists | |
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| Negative Items in Lists | |
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| List Items in Files | |
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| Lookup Items in Lists | |
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| Domain Lists | |
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| Host Lists | |
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| Address Lists | |
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| Miscellany | |
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| Security Issues | |
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| Privileged Users | |
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| RFC Conformance | |
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| Timestamps | |
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| Checking Spool Space | |
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| Control of DNS Lookups | |
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| Bounce Message Handling | |
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| Miscellaneous Controls | |
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| Command-Line Interface to Exim | |
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| Input Mode Control | |
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| Additional Message Data | |
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| Immediate Delivery Control | |
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| Error Routing | |
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| Queue Runner Processes | |
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| Configuration Overrides | |
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| Watching Exim's Queue | |
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| Message Control | |
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| Testing Options | |
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| Options for Debugging | |
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| Terminating the Options | |
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| Embedded Perl Options | |
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| Compatibility with Sendmail | |
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| Calling Exim by Different Names | |
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| Administering Exim | |
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| Log Files | |
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| Log Destination Control | |
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| Format of Main Log Entries | |
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| Cycling Log Files | |
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| Extracting Information from Log Files | |
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| Watching What Exim is Doing | |
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| The Exim Monitor | |
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| Maintaining Alias and Other Datafiles | |
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| Hints Database Maintenance | |
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| Mailbox Maintenance | |
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| Building and Installing Exim | |
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| Prerequisites | |
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| Fetching and Unpacking the Source | |
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| Configuration for Building | |
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| The Building Process | |
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| Installing Exim | |
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| Testing Before Turning On | |
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| Turning Exim On | |
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| Installing Documentation in Info Format | |
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| Upgrading to a New Release | |
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| Summary of String Expansion | |
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| Regular Expressions | |
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| Index | |