Updated: 2022/Sep/29

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POSTCAT(1)                  General Commands Manual                 POSTCAT(1)

       postcat - show Postfix queue file contents

       postcat [-bdehnoqv] [-c config_dir] [files...]

       The postcat(1) command prints the contents of the named files in
       human-readable form. The files are expected to be in Postfix queue file
       format. If no files are specified on the command line, the program
       reads from standard input.

       By default, postcat(1) shows the envelope and message content, as if
       the options -beh were specified. To view message content only, specify
       -bh (Postfix 2.7 and later).


       -b     Show body content.  The -b option starts producing output at the
              first non-header line, and stops when the end of the message is

              This feature is available in Postfix 2.7 and later.

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

       -d     Print the decimal type of each record.

       -e     Show message envelope content.

              This feature is available in Postfix 2.7 and later.

       -h     Show message header content.  The -h option produces output from
              the beginning of the message up to, but not including, the first
              non-header line.

              This feature is available in Postfix 2.7 and later.

       -o     Print the queue file offset of each record.

       -q     Search the Postfix queue for the named files instead of taking
              the names literally.

              This feature is available in Postfix 2.0 and later.

       -r     Print records in file order, don't follow pointer records.

              This feature is available in Postfix 3.7 and later.

       -s offset
              Skip to the specified queue file offset.

              This feature is available in Postfix 3.7 and later.

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

       Problems are reported to the standard error stream.


              Directory with Postfix configuration files.

       The following main.cf parameters are especially relevant to this

       The text below provides only a parameter summary. See postconf(5) for
       more details including examples.

       config_directory (see 'postconf -d' output)
              The default location of the Postfix main.cf and master.cf
              configuration files.

       import_environment (see 'postconf -d' output)
              The list of environment parameters that a privileged Postfix
              process will import from a non-Postfix parent process, or
              name=value environment overrides.

       queue_directory (see 'postconf -d' output)
              The location of the Postfix top-level queue directory.

       /var/spool/postfix, Postfix queue directory

       postconf(5), Postfix configuration

       The Secure Mailer license must be distributed with this software.

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

       Wietse Venema
       Google, Inc.
       111 8th Avenue
       New York, NY 10011, USA