Страницы справочника OS X

Эта страница руководства для  версии 10.9 Mac OS X

Читать страницы руководства

BOUNCE(5)                                                                                          BOUNCE(5)



NAME
       bounce - Postfix bounce message template format

SYNOPSIS
       bounce_template_file = /etc/postfix/bounce.cf

       postconf -b [template_file]

DESCRIPTION
       The  Postfix  bounce(8) server produces delivery status notification (DSN) messages for undeliverable
       mail, delayed mail, successful delivery or address verification requests.

       By default, these notifications are generated from built-in templates with message headers  and  mes-sage message
       sage  text. Sites can override the built-in information by specifying a bounce template file with the
       bounce_template_file configuration parameter.

       This document describes the general procedure to create a bounce template file, followed by the  spe-cific specific
       cific details of bounce template formats.

GENERAL PROCEDURE
       To  create  a  customized  bounce  template  file,  create  a  temporary  copy of the file /etc/post-fix/bounce.cf.default /etc/postfix/bounce.cf.default
       fix/bounce.cf.default and edit the temporary file.

       To preview the results of $name expansions in the template text, use the command

           postconf -b temporary_file

       Errors in the template will be reported to the standard error stream and to the syslog daemon.

       While previewing the text, be sure to pay particular attention to the expansion of time value parame-ters parameters
       ters that appear in the delayed mail notification text.

       Once the result is satisfactory, copy the template to the Postfix configuration directory and specify
       in main.cf something like:

       /etc/postfix/main.cf:
           bounce_template_file = /etc/postfix/bounce.cf

TEMPLATE FILE FORMAT
       The template file can specify templates for failed mail, delayed mail,  successful  delivery  or  for
       address  verification.   These templates are named failure_template, delay_template, success_template
       and verify_template, respectively.  You can but do not have to specify all four templates in a bounce
       template file.

       Each  template  starts with "template_name = <<EOF" and ends with a line that contains the word "EOF"
       only. You can change the word EOF, but you can't enclose it in quotes as with the shell or with  Perl
       (template_name = <<'EOF'). Here is an example:

           # The failure template is used for undeliverable mail.

           failure_template = <<EOF
           Charset: us-ascii
           From: MAILER-DAEMON (Mail Delivery System)
           Subject: Undelivered Mail Returned to Sender
           Postmaster-Subject: Postmaster Copy: Undelivered Mail

           This is the mail system at host $myhostname.

           I'm sorry to have to inform you that your message could not
           be delivered to one or more recipients. It's attached below.

           For further assistance, please send mail to postmaster.

           If you do so, please include this problem report. You can
           delete your own text from the attached returned message.

                              The mail system
           EOF

       The usage and specification of bounce templates is subject to the following restrictions:

       •      No  special  meaning  is  given to the backslash character or to leading whitespace; these are
              always taken literally.

       •      Inside the << context, the "$" character is special. To produce a  "$"  character  as  output,
              specify "$$".

       •      Outside  the  <<  context, lines beginning with "#" are ignored, as are empty lines, and lines
              consisting of whitespace only.

       Examples of all templates can be found in the file bounce.cf.default  in  the  Postfix  configuration
       directory.

TEMPLATE HEADER FORMAT
       The  first  portion  of a bounce template consists of optional template headers.  Some become message
       headers in the delivery status notification; some control the formatting of that notification.  Head-
       ers not specified in a template will be left at their default value.

       The following headers are supported:

       Charset:
              The  MIME  character set of the template message text.  See the "TEMPLATE MESSAGE TEXT FORMAT"
              description below.

       From:  The sender address in the message header of the delivery status notification.

       Subject:
              The subject in the message header of the delivery status notification that is returned to  the
              sender.

       Postmaster-Subject:
              The  subject that will be used in Postmaster copies of undeliverable or delayed mail notifica-tions. notifications.
              tions. These copies are sent under control of the notify_classes configuration parameter.

       The usage and specification of template message headers is subject to the following restrictions:

       •      Template message header names can be specified in upper case, lower case or mixed case.  Post-fix Postfix
              fix always produces bounce message header labels of the form "From:" and "Subject:".

       •      Template message headers must not span multiple lines.

       •      Template message headers do not support $parameter expansions.

       •      Template  message  headers must contain ASCII characters only, and must not contain ASCII null
              characters.

TEMPLATE MESSAGE TEXT FORMAT
       The second portion of a bounce template consists of message text. As the above  example  shows,  tem-plate template
       plate  message  text  may  contain  main.cf  $parameters.  Besides the parameters that are defined in
       main.cf, the following parameters are treated specially depending on the suffix that is  appended  to
       their name.

       delay_warning_time_suffix
              Expands  into the value of the delay_warning_time parameter, expressed in the time unit speci-fied specified
              fied by suffix, which is one of seconds, minutes, hours, days, or weeks.

       maximal_queue_lifetime_suffix
              Expands into the value of the maximal_queue_lifetime parameter, expressed  in  the  time  unit
              specified by suffix.  See above under delay_warning_time for possible suffix values.

       The usage and specification of template message text is subject to the following restrictions:

       •      The template message text is not sent in Postmaster copies of delivery status notifications.

       •      If the template message text contains non-ASCII characters, Postfix requires that the Charset:
              template header is updated.  Specify an appropriate  superset  of  US-ASCII.   A  superset  is
              needed  because Postfix appends ASCII text after the message template when it sends a delivery
              status notification.

SEE ALSO
       bounce(8), Postfix delivery status notifications
       postconf(5), configuration parameters

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

HISTORY
       The Postfix bounce template format was originally developed by Nicolas Riendeau.

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



                                                                                                   BOUNCE(5)