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Mail and Messaging Guide



About this book
        How this book is organized
        How can we improve this book?

Using and administering electronic mail
        Mail User Agents
        Mail Transfer Agents
                Comparison of sendmail with MMDF
                Changing Mail Transfer Agents
        MMDF interoperability
        POP3 and IMAP4 servers
                Using the POP server
                        Removing the POP server
        MMDF configuration and administration managers
        MIME conformance
        User configurable timeout

Using e-mail
                Starting and quitting mail
                        Getting help
                        Quitting mail
                Reading mail
                        Viewing the header list
                        Selecting particular messages
                        Changing the order of the header list
                Replying to a message
                Forwarding a message to another user
                Creating and sending a message
                Sending mail from the command line
                Editing a message's header
                Editing a message
                Including a file or a message in mail
                Canceling a message
                Addressing mail to users on other systems
                Saving a message
                Printing a message
                Deleting a message
                Restoring a message
                Sending a message to a list of people using an alias
                Attaching a signature to your messages
                Adding your real name to the message header
        Organizing your mail into folders
        Working with attachments and large files
                Reading an attachment
                Sending large files via mail
                        Compressing and encoding a file
                        Decoding and uncompressing a file
                Running UNIX commands from within mail
        Customizing mail
                Making mail execute commands at startup
                Automatic notification of new mail
                Redirecting incoming messages to other folders
                Sending automatic responses when on vacation
                Forwarding your messages automatically
        More about mail
        Other ways of contacting users
                Holding conversations using talk
                Preventing someone from writing a message to you

Using SCO Shell Mail
                Starting mail
                Quitting from mail
                Getting help when you are using e-mail
                Reading mail
                        Speed-reading mail
                        Reading an attachment
                Replying to a message
                Forwarding a message to another user
                        Changing the comment line in forwarded messages
                Saving a message
                        Saving a message to a file
                        Saving a message to a mail folder
                        Automatically saving a message when you have read it
                        Saving a message with an attachment
                Deleting a message
                        Restoring a message
                        Automatically deleting saved messages
                Printing a message
                Viewing the history of a message
                Organizing your mail
                        Viewing the contents of a folder or drawer
                        Starting mail from a different mail folder
                        Creating a new folder or drawer
                        Renaming a folder or drawer
                        Moving a folder
                        Deleting a folder or a drawer
                        Switching to a new mail folder
                Listing specified mail messages
                Changing the format of the message list
                Creating and sending a message
                Editing a message's address before sending the message
                Editing a message before you send it
                Canceling a message before you send it
                Holding a message for delivery at a later time
                        Retrieving a held message
                Delaying the delivery of a message
                Retrieving a delayed message
                        Editing a delayed message
                        Sending all delayed messages now
                        Canceling a delayed message
                Saving the messages you send
                        Archiving your outgoing mail
                Including a file or a message in mail
                Including information from other applications in a message
                Attaching a file to a message
                Sending a message to a list of people
                        Creating a new alias
                        Editing an alias
                        Deleting an alias
                        Viewing an alias
                        Including yourself in an alias
                        Problems with using an alias
                Verifying the delivery address before sending the message
                Attaching a signature to your messages
                Including your real name in the message header
                Running UNIX commands from within SCO Shell Mail
                Sending large files via mail
                Sending mail to other computers

Managing mail with MMDF
        How to start a Mail manager
                Problems with SCOadmin Mail Managers
        Running the MMDF Configuration Manager
                MMDF configuration information
                        Specifying the host name
                        Specifying networks to use with MMDF
                        Specifying format for mail user addresses
                        Selecting name server lookup method
                        Specifying where to forward mail for unknown hosts or users
                        Specifying the location of user mailboxes
                        Specifying the postmaster address
                        Redirecting mail for root or mmdf
                        Specifying full domain names for UUCP and Micnet hosts
                        Allowing mail replies between an MMDF and non-MMDF system through Micnet
                Unsupported configurations
        Testing MMDF configuration
                Checking for MMDF problems
                Testing mail addresses
        Adding or removing a mail user
                Adding or removing a user from system-wide aliases
                Redirecting mail to another user
                Removing or moving a retired mailbox
        Managing mail hosts
                Adding or removing a mail host
                        Specifying address rewriting
                        Removing a host
                Changing a remote host name
        Managing mail aliases and lists
                Adding or removing a mail alias
                        Maintaining alias members in a file
                        Removing an alias
                        Bypassing aliases
                        Specifying public aliases
                Adding or removing an alias member
                Searching an alias or mailing list
                        Redirecting and piping mail
                Maintaining mailing lists
                The postmaster address
                Associating users with a home machine
        Managing mail channels
                Adding channels
                        Specifying channel address parameters
                        Specifying channel delivery options
                Removing a channel
                Modifying channel parameters
                Channel configuration strings
                        The uucp configuration string
                        The smtp configuration string
                Routing mail for unrecognized hosts
                Routing mail for unrecognized users
                About mail channels
                Channel programs
        Managing mail domains
                Adding or removing a domain
                Modifying domain parameters
                Domain names
                Registering domain names
        Mail addressing and delivery
                Referencing addresses maintained in a file
                Customizing mail delivery
                        Changing the deliver interval
                        Running multiple deliver processes
                        Specifying different time intervals for deliver
                        The deliver program
                        The submit program
                        Specifying uux routing options for UUCP
                Specifying the MMDF ``signature''
                Forwarding mail from one account to another
                Changing the system name
        How MMDF works
                Processing incoming mail
                Processing outgoing mail
                How MMDF routes mail
                Searching MMDF domain tables
        MMDF configuration files
                Modifying MMDF table parameters
                Domain tables
                        Domain table format
                        The local.dom table
                        The root.dom table
                        The uucp.dom table
                        Creating other domain tables
                        LAN considerations
                Channel tables
                        The local.chn table
                        The list.chn table
                        The uucp.chn table
                        The smtp.chn table
                Alias and mailing list tables
                        How alias tables are created
                        How MMDF uses alias tables
                Assigning Mail IDs
                The mmdftailor file
                Editing MMDF configuration files manually
                        Rebuilding the hashed database
                Mail headers
                Mailbox locking
        Specifying MMDF authorizations
                Specifying host-based authorization
                Specifying user-based authorization
                Setting routing-based authorization
                Specifying both host and user authorization
                Specifying channel authorization levels
                Changing error logging levels
                Authorization log files
                        Authorization message keys
                        Single-reason authorization codes
                        Two-reason authorization codes
        Troubleshooting MMDF
                Failed mail error
                Mail does not work, no returned mail
                Unable to reply to mail from a Micnet host
                Mail command hangs
                Mailbox locking problems
                Undelivered messages in /usr/spool/mmdf/lock/home
                Using name server resource records with MMDF
                Mail-related name server resource records
                MMDF delivers mail twice or not at all
                Smtp cannot establish a remote connection
                UUCP channel delays mail delivery
                Message not deliverable
        Example MMDF configurations over TCP/IP
                Setting up MMDF on a TCP/IP network
                Setting up MMDF using a mail gateway
                Setting up MMDF over TCP/IP with a UUCP Internet gateway

sendmail administration
        How sendmail works
                Outgoing mail
                Incoming mail
                        SMTP server
                        UUCP server
                sendmail execution
                        User information database
                        Using options and flags
                        Configuration file priority
                        Mailers
                        Recipient address parsing
                        Message collection and storage
                        Message delivery
                        Return to sender
                        Queued messages
                sendmail interfaces
                Mail to files and programs
        Standard sendmail configuration
                Running mkdev cf
                Editing the daemon invocation
                Running and testing sendmail
        Tuning sendmail configuration
                        Timeout options syntax
                Changing the queue processing interval
                Creating a user information database
                        Structure of the user database
                Altering read timeouts
                Altering message timeouts
                Forking during queue runs
                Altering queue priorities
                Setting the mail load limit
                Setting the delivery mode
                Log Levels
                Changing file permissions
                        suid root options
                Turning off security checks
                Setting connection caching parameters
                Using sendmail with a name server
                Moving the per-user forward files
                Setting mail queue filesystem free space
                Setting maximum message size
                Setting privacy flags
                Setting ``send to me too'' operation
        Reconfiguring sendmail
        Administering sendmail
                Debugging sendmail
                Changing the values of options
                Trying a Different Configuration File
                Logging traffic
                Testing configuration files
                Persistent host status information
                Viewing the system log
                Log entry format
                Levels
                Dumping state
                Viewing the mail queue
                        Format of sendmail queue files
                        Queue interval
                        Forcing the queue
                Disk-based connection information
                The service switch
                Maintaining the alias database
                        Rebuilding the alias database
                        Potential alias database problems
                        List owners
                        Stopping and restarting sendmail
                Managing spam
                        Relaying
                        Sender checks
                        Access database
                        Header checks
                Enabling user forwarding (.forward files)
                Special header lines
                        Errors-To:
                        Apparently-To:
                        Precedence:
                IDENT protocol support
                Summary of support files
        Advanced sendmail configuration
                /usr/lib/sendmail.cf overview
                        Macros
                        Options
                        Message precedences
                        Format of headers
                        Address rewriting rules
                        Mailer declarations
                Configuration file lines
                        R and S--rewriting rules
                        Semantics of rewriting rule sets
                        Ruleset hooks
                Building a configuration file from scratch
                        Purpose of the configuration file
                        Relevant issues
                        How to proceed
                        Testing the rewriting rules: the -bt flag
                        Building mailer descriptions
        For more about sendmail

Administering a local MMDF system
        How to start a Mail manager
        Managing mail aliases and lists
                Adding or removing a mail alias
                        Maintaining alias members in a file
                        Removing an alias
                Adding or removing an alias member
                Searching an alias or mailing list
                        Redirecting and piping mail
                Maintaining mailing lists
        Adding or removing a mail user
                Adding or removing a user from system-wide aliases
                Redirecting mail to another user
                Removing or moving a retired mailbox
        Checking the status of mail queues
                Removing old mail from the queues
        Monitoring log files
        MMDF configuration files
                        The list.chn table
                Alias and mailing list tables
                Assigning Mail IDs
                The mmdftailor file
                Editing configuration files manually
                        Rebuilding the hashed database
                Mailbox locking

mail(C) commands

Mail/MMDF glossary

Index