Message Exchange Management Guide

Contents

Chapter 1
1	Overview of Message Exchange Operation
1.1	What is a Message?
1.2	What is an Address?
1.3	MX Components
1.3.1	The Message Queue
1.3.2	Message Entry Agents
1.3.3	The Router
1.3.4	Delivery Agents
1.3.5	MLF Agent
Chapter 2
2	Configuring MX with MXCONFIG
2.1	Why Use MXCONFIG?
2.2	Using MXCONFIG
Chapter 3
3	Managing the Router
3.1	Rewrite Rules
3.1.1	Regular Expressions in Rewrite Rules
3.2	Defining Delivery Paths
3.3	Alias Translation
3.4	Controlling the Router Process
3.5	Logging Router Events
Chapter 4
4	Managing the Delivery Agents
4.1	Local Delivery Options
4.2	SMTP, DECNET_SMTP, and X25_SMTP Delivery Options
4.2.1	Internet "Mail Exchanger" Support
4.2.2	Character Set Conversion
4.2.3	Default SMTP Router
4.2.4	SMTP Lock Files
4.2.4.1	Excluding Hosts from Locks
4.3	UUCP Delivery Options
4.4	SITE Delivery Options
4.5	The LISTSERV Interface
4.6	Shutdowns and Resets
4.7	Logging Delivery Agent Events
Chapter 5
5	Managing Message Entry Agents
5.1	Local Message Entry
5.1.1	System-wide MX Aliases for Outgoing Addresses
5.1.2	VMS MAIL Protocol Prefix
5.1.3	Default Host Names
5.1.4	Character Set Conversion
5.2	SMTP_SERVER
5.2.1	SMTP Server Threads
5.2.2	Limiting "Outside" Thread Usage
5.2.3	Setting the SMTP Listener Port
5.3	DECNET_SMTP Network Object
5.4	X25_SMTP Network Object
5.5	Message Entry Agent Shutdowns
Chapter 6
6	Managing the Message Queue
6.1	Establishing the Queue Size
6.2	Running the MX FLQ Manager
6.3	Queue Cleanup Logicals
6.4	Automatic Purging of Finished Queue Entries
6.5	The MCP QUEUE Commands
6.5.1	Interpreting MCP QUEUE SHOW Output
6.5.2	Forcing a Message to "Bounce"
6.5.3	Interpreting MCP QUEUE STATISTICS Output
Chapter 7
7	Configuring MX for Part-Time Internet Connections
7.1	Environment for Part-Time Connections
7.2	Configuring MX as a Part-Time Client
7.3	Configuring MX as a Server for Part-Time Clients
7.4	ETRN Support
7.5	Example Configuration
Chapter 8
8	Reducing or Eliminating "Junk" E-Mail
8.1	What is "junk" E-Mail?
8.2	MX Filtering Features
8.3	Sender Validation
8.4	Disabling the SMTP Relay Function
8.4.1	Identifying Inside Networks and Hosts
8.4.2	Disabling the "Percent Hack"
8.5	Realtime Blackhole List
8.6	Establishing Rejection Criteria with REJMAN
8.6.1	Address-Based Rejections
8.6.2	Header-based Rejections
8.6.3	Tracking Rejections
8.6.4	Purging Old Rules
8.7	Heuristic Filters
8.7.1	Confidence Levels
8.7.2	Rejection Actions
8.7.3	Junk Mail Warnings
8.8	Logging SMTP Server Rejections
8.9	Debugging Rejection Rules and Heuristic Filters
8.10	Reducing Junk Mail Postings on Mailing Lists
8.10.1	Ignoring Heuristically-Determined Junk Mail
8.10.2	Ignoring Messages Without the List Address
8.11	Using SMTP Authentication to Bypass Junk Mail Checking
8.11.1	Authentication Mechanisms Supported
8.11.2	Managing the SMTP Authentication Database
8.11.3	How Authentication Works
8.11.4	PLAIN Authentication Features
8.11.5	Limiting SMTP Authentication Access to Certain Users
8.11.6	Intrusion Detection and Evasion
8.11.6.1	Authentication Retry Timers
8.11.6.2	Authentication Retry Limits
8.11.6.3	Intrusion Evasion
Chapter 9
9	Other Miscellaneous Utilities
9.1	The MLFAKE Utility
9.2	The MAILQUEUE Utility
9.3	The MX_DECODE Utility
Chapter 10
10	Troubleshooting MX
10.1	Queue Files Used by MX Components
10.1.1	File Types
10.2	Process Names
10.3	Debug/Trace Output
Chapter 11
11	The MX Startup Process
11.1	Startup Command Procedures
11.2	Startup Data Files
Part
Part	MCP Command Dictionary
Command 1	MCP
Command 2	@ (Redirect Command Input)
Command 3	ADD USER
Command 4	ATTACH
Command 5	CREATE USER_DATABASE_FILE
Command 6	DEFINE/KEY
Command 7	DEFINE ALIAS
Command 8	DEFINE FILE_SERVER
Command 9	DEFINE INSIDE_NETWORK_ADDRESS
Command 10	DEFINE LIST
Command 11	DEFINE LOCAL_DOMAIN
Command 12	DEFINE PATH
Command 13	DEFINE REWRITE_RULE
Command 14	DEFINE SYSTEM_USERS
Command 15	EXIT
Command 16	HELP
Command 17	MODIFY
Command 18	MODIFY USER
Command 19	QUEUE CANCEL
Command 20	QUEUE COMPRESS
Command 21	QUEUE CREATE
Command 22	QUEUE DUMP
Command 23	QUEUE EXTEND
Command 24	QUEUE HOLD
Command 25	QUEUE PURGE
Command 26	QUEUE READY
Command 27	QUEUE SELECT
Command 28	QUEUE SHOW
Command 29	QUEUE STATISTICS
Command 30	QUEUE SYNCHRONIZE
Command 31	QUIT
Command 32	REMOVE
Command 33	REMOVE USER
Command 34	RESET
Command 35	REVIEW
Command 36	SAVE
Command 37	SET DECNET_SMTP
Command 38	SET LOCAL
Command 39	SET MLF
Command 40	SET ROUTER
Command 41	SET SITE
Command 42	SET SMTP
Command 43	SET X25_SMTP
Command 44	SHOW
Command 45	SHUTDOWN
Command 46	SPAWN
Command 47	STATUS
Part
Part	REJMAN Command Dictionary
Command 48	REJMAN
Command 49	Command Input Redirection
Command 50	ADD EXCLUSION
Command 51	ADD REJECTION
Command 52	ATTACH
Command 53	CHECK
Command 54	DEFINE/KEY
Command 55	DELETE EXCLUSION
Command 56	DELETE REJECTION
Command 57	DISABLE HEURISTIC
Command 58	ENABLE HEURISTIC
Command 59	EXIT
Command 60	HELP
Command 61	QUIT
Command 62	PURGE
Command 63	SAVE
Command 64	SET HEURISTICS
Command 65	SHOW
Command 66	SPAWN
Part
Part	Appendices
Appendix A
Appendix A	Regular Expressions
A.1	Specifying Regular Expressions
A.1.1	Examples
A.1.2	Substitutions
Index
Index
Figures
1-1	Message parts
Tables
5-1	Address Formatting Logical Names
6-1	FLQ Manager/Router queue-related logicals
8-1	Heuristic Filters
8-2	Intrusion Detection and Evasion Parameters
10-1	Debug/Trace logical names
11-1	Component names for use with MX_STARTUP.COM
1	MCP Owner Notification Types
2	MCP Mailing list protection classes
3	MCP Mailing list protection codes
4	MCP Typical protection codes
5	MCP QUEUE DUMP Output Files
6	MCP Header name keywords
7	MCP MCP STATUS Descriptions
1	A Atom Sequencing Terms
2	A Atom Sequences
3	A Collating Elements in Bracket Expressions
4	A Character Classes