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Administering Mail and Messaging
Administering Mail and Messaging
The message transport agent
Mail user agents
Message store
The Mail Manager
Default configuration
Managing aliases
Managing domains
Masquerading or domain hiding
Domain tables
sendmail.cf implementation of the domain table
Domain table format
Configuring INBOX locations
Managing mail channels
The default channels
The UUCP channel
The baduser channel
The badhost channel
sendmail.cf implementation of mail channels
Channel tables
Look in name service
Match UUCP configuration
Match local users
Match non-local users
Match unknown users
File lookup
Channel delivery
Managing virtual domains
How virtual domains work
Enabling virtual domains
Warnings for users in virtual domains
Managing aliases in virtual domains
Managing spam
Blocking spam email from known offenders
Blocking spam email using the MAPS Realtime Blackhole List
Prevention of forged-spam email via sendmail (relay disable)
Email spam detection method for ISPs
Sendmail Operation Guide
Basic installation
Compiling sendmail
Modifying the makefile
Compilation and installation
Configuration files
Details of installation files
Normal operations
The system log
Dumping state
The mail queue
Printing the queue
Forcing the queue
Disk-based connection information
The service switch
The alias database
Rebuilding the alias database
Potential problems
List owners
User information database
Per-user forwarding (.forward files)
Special header lines
IDENT protocol support
Arguments
Queue interval
Daemon mode
Forcing the queue
Debugging
Changing the values of options
Trying a different configuration file
Logging traffic
Testing configuration files
Persistent host status information
Tuning
Timeouts
Queue interval
Read timeouts
Message timeouts
Forking during queue runs
Queue priorities
Load limiting
Delivery mode
Log level
File modes
setuid status
Connection caching
Name server access
Moving the per-user forward files
Free space
Maximum message size
Privacy flags
Send to me too
The configuration file
R and S: rewriting rules
The left hand side
The right hand side
Semantics of rewriting rule sets
Ruleset hooks
IPC mailers
D: define macro
C and F: define classes
M: define mailer
H: define header
O: set option
P: precedence definitions
V: configuration version level
K: key file declaration
The user database
Structure of the user database
User database semantics
Creating the database
Other configuration
Parameters in BuildTools/OS/$oscf
Parameters in src/conf.h
Configuration in src/conf.c
Built-in header semantics
Restricting use of email
Load average computation
New database map classes
Queueing function
Refusing incoming SMTP connections
Configuration in src/daemon.c
Queue file formats
Summary of support files