ddh(8)                              CLIX                              ddh(8)



  NAME

    ddh - Runs message handling system (MHS) deferred delivery handler (DDH)

  SYNOPSIS

    ddh -s

  FLAGS

    -s   Spawns the handler process.

  DESCRIPTION

    The deferred delivery handler (DDH) manages requests passed to it from the
    message transfer agent (MTA).  The ddh command is an extension of the
    message transfer agent (MTA).  The ddh command manages all deferred
    delivery requests that are passed to it from the MTA by the deferral
    request queue (DRQ).

    Once the delivery time arrives for a message, the ddh command copies the
    file (message) into the Input Queue (IQ).  The MTA then routes and
    delivers the message as if it had just been submitted.

  CAUTIONS

    The ddh command is an optional feature of the Message Handling Service
    (MHS).  If the MTA is not configured to defer locally, the message is
    routed to the RTS (where the deferral may take place) or alternatively
    delivered immediately.  In either case, deferred delivery cancellation
    cannot be invoked.

    The user should never invoke the ddh command.  The MHS System
    Administrator should place an entry in the crontab file to have the ddh -s
    command started every 15 minutes to check the DDQ.

  DIAGNOSTICS

    An I/O error can occur if the handler cannot open the docket file.

  EXIT VALUES

    Exit values are not valid.

  RELATED INFORMATION

    Commands:  mta(8), xcancel(8)

    Files:  docket(4)

    Intergraph ISO/OSI Administrator's Guide



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