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QSHAPE(1)							     QSHAPE(1)

NAME
       qshape - Print Postfix queue domain and age distribution

SYNOPSIS
       qshape [-s] [-p] [-m min_subdomains]
	       [-b bucket_count] [-t bucket_time]
	       [-l] [-w terminal_width]
	       [-N batch_msg_count] [-n batch_top_domains]
	       [-c config_directory] [queue_name ...]

DESCRIPTION
       The qshape program helps the administrator understand the Postfix queue
       message distribution in time and by sender domain or recipient  domain.
       The program needs read access to the queue directories and queue files,
       so it must run as the superuser or the mail_owner specified in  main.cf
       (typically postfix).

       Options:

       -s     Display  the sender domain distribution instead of the recipient
	      domain distribution.  By default the recipient  distribution  is
	      displayed.  There	 can  be more recipients than messages, but as
	      each message has only one sender, the sender distribution	 is  a
	      message distribution.

       -p     Generate	aggregate  statistics  for  parent  domains. Top level
	      domains are not shown, nor are domains with fewer than  min_sub‐
	      domains subdomains. The names of parent domains are shown with a
	      leading dot, (e.g. .example.com).

       -m min_subdomains
	      When used with the -p option, sets the minimum  subdomain	 count
	      needed  to show a separate line for a parent domain. The default
	      is 5.

       -b bucket_count
	      The age distribution is broken up into a sequence	 of  geometri‐
	      cally  increasing	 intervals.  This  option  sets	 the number of
	      intervals or "buckets". Each bucket has a maximum queue age that
	      is  twice	 as  large  as	that  of the previous bucket. The last
	      bucket has no age limit.

       -t bucket_time
	      The age limit in minutes for the first time bucket. The  default
	      value  is	 5,  meaning  that  the	 first	bucket counts messages
	      between 0 and 5 minutes old.

       -l     Instead of using a geometric age	sequence,  use	a  linear  age
	      sequence, in other words simple multiples of bucket_time.

	      This feature is available in Postfix 2.2 and later.

       -w terminal_width
	      The  output  is  right  justified,  with the counts for the last
	      bucket shown on the  80th	 column,  the  terminal_width  can  be
	      adjusted for wider screens allowing more buckets to be displayed
	      without truncating the domain names on the left. When a row  for
	      a	 full  domain name and its counters does not fit in the speci‐
	      fied number of columns, only the last 17	bytes  of  the	domain
	      name  are	 shown	with  the  prefix replaced by a '+' character.
	      Truncated parent domain rows are shown as '.+' followed  by  the
	      last 16 bytes of the domain name. If this is still too narrow to
	      show the domain name and all the	counters,  the	terminal_width
	      limit is violated.

       -N batch_msg_count
	      When  the	 output device is a terminal, intermediate results are
	      shown each  "batch_msg_count"  messages.	This  produces	usable
	      results  in  a  reasonable  time even when the deferred queue is
	      large. The default is to show intermediate  results  every  1000
	      messages.

       -n batch_top_domains
	      When  reporting  intermediate  or	 final results to a termainal,
	      report only the top  "batch_top_domains"	domains.  The  default
	      limit is 20 domains.

       -c config_directory
	      The main.cf configuration file is in the named directory instead
	      of the default configuration directory.

       Arguments:

       queue_name
	      By default qshape displays  the  combined	 distribution  of  the
	      incoming	and  active  queues.  To  display  a  different set of
	      queues, just list their directory names  on  the	command	 line.
	      Absolute paths are used as is, other paths are taken relative to
	      the main.cf queue_directory parameter  setting.	While  main.cf
	      supports the use of $variable expansion in the definition of the
	      queue_directory parameter, the qshape program does not.  If  you
	      must use variable expansions in the queue_directory setting, you
	      must specify an explicit absolute path for each queue  subdirec‐
	      tory even if you want the default incoming and active queue dis‐
	      tribution.

SEE ALSO
       mailq(1), List all messages in the queue.
       QSHAPE_README Examples and background material.

FILES
       $config_directory/main.cf, Postfix installation parameters.
       $queue_directory/maildrop/, local submission directory.
       $queue_directory/incoming/, new message queue.
       $queue_directory/hold/, messages waiting for tech support.
       $queue_directory/active/, messages scheduled for delivery.
       $queue_directory/deferred/, messages postponed for later delivery.

LICENSE
       The Secure Mailer license must be distributed with this software.

AUTHOR(S)
       Victor Duchovni
       Morgan Stanley

								     QSHAPE(1)
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