POSTSUPER(1)						      General Commands Manual						      POSTSUPER(1)

NAME

       postsuper - Postfix superintendent

SYNOPSIS

       postsuper [-psv] [-d queue_id] [-r queue_id] [directory ...]

DESCRIPTION

       The postsuper command does maintenance jobs on the Postfix queue. Use of the command is restricted to the super-user.

       By  default,  postsuper	performs  the operations requested with the -s and -p command-line options on all Postfix queue directories - this
       includes the incoming, active and deferred directories with mail files and the bounce, defer and flush directories with log files.

       Options:

       -d queue_id
	      Delete one message with the named queue ID from the named mail queue(s) (default: incoming, active and deferred).  If a queue_id	of
	      - is specified, the program reads queue IDs from standard input.

	      Specify  -d ALL to remove all messages; for example, specify -d ALL deferred to delete mail in the deferred queue.  As a safety mea-
	      sure, the word ALL must be specified in upper case.

	      Postfix queue IDs are reused.  There is a very small possibility that postsuper deletes the wrong message file when it  is  executed
	      while the Postfix mail system is running.

	      The scenario is as follows:

	      1)     The Postfix queue manager deletes the message that postsuper is supposed to delete, because Postfix is finished with the mes-
		     sage.

	      2)     New mail arrives, and the new message is given the same queue ID as the message that postsuper is supposed  to  delete.   The
		     probability  for  reusing	a deleted queue ID is about 1 in 2**15 (the number of different microsecond values that the system
		     clock can distinguish within a second).

	      3)     postsuper deletes the new message, instead of the old message that it should have deleted.

       -p     Purge old temporary files that are left over after system or software crashes.

       -r queue_id
	      Requeue the message with the named queue ID from the named mail queue(s) (default: incoming, active and deferred).  To requeue  mul-
	      tiple  messages,	specify multiple -r command-line options.  Alternatively, if a queue_id of - is specified, the program reads queue
	      IDs from standard input.

	      Specify -r ALL to requeue all messages. As a safety measure, the word ALL must be specified in upper case.

	      A requeued message is moved to the maildrop queue, from where it is copied by the pickup daemon to a new file whose name is  guaran-
	      teed  to	match  the  new queue file inode number. The new queue file is subjected again to mail address rewriting and substitution.
	      This is useful when rewriting rules or virtual mappings have changed.

	      Postfix queue IDs are reused.  There is a very small possibility that postsuper requeues the wrong message file when it is  executed
	      while the Postfix mail system is running, but no harm should be done.

       -s     Structure check and structure repair.  It is highly recommended to perform this operation once before Postfix startup.

	      o      Rename  files  whose  name  does  not match the message file inode number. This operation is necessary after restoring a mail
		     queue from a different machine, or from backup media.

	      o      Move queue files that are in the wrong place in the file system hierarchy	and  remove  subdirectories  that  are	no  longer
		     needed.  File position rearrangements are necessary after a change in the hash_queue_names and/or hash_queue_depth configura-
		     tion parameters.

       -v     Enable verbose logging for debugging purposes. Multiple -v options make the software increasingly verbose.

DIAGNOSTICS

       Problems are reported to the standard error stream and to syslogd.

       postsuper reports the number of messages deleted with -d, the number of messages requeued with -r, and the number of messages  whose  queue
       file name was fixed with -s. The report is written to the standard error stream and to syslogd.

CONFIGURATION PARAMETERS

       See the Postfix main.cf file for syntax details and for default values.

       hash_queue_depth
	      Number of subdirectory levels for hashed queues.

       hash_queue_names
	      The names of queues that are organized into multiple levels of subdirectories.

LICENSE

       The Secure Mailer license must be distributed with this software.

AUTHOR(S)
       Wietse Venema
       IBM T.J. Watson Research
       P.O. Box 704
       Yorktown Heights, NY 10598, USA

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