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completed: delivery status (and text) filter

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  • Wietse Venema
    The Postfix delivery status filter support is complete as of postfix-2.12-20140321. This can replace the delivery status codes and explanatory text of
    Message 1 of 2 , Mar 21, 2014
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      The Postfix delivery status filter support is complete as of
      postfix-2.12-20140321. This can replace the delivery status codes
      and explanatory text of successful or unsuccessful deliveries by
      Postfix mail delivery agents.

      It was originally implemented for sites that want to turn certain
      SMTP client soft delivery errors into hard delivery errors, but it
      can also be used to censor out local information from delivery
      confirmation reports.

      Below is text from the RELEASE_NOTES with examples.

      Wietse

      This feature is implemented as a filter that replaces the three-number
      enhanced status code and descriptive text in Postfix delivery agent
      success, bounce, or defer messages. Note: this will not override
      "soft_bounce=yes", and this will not change a successful delivery
      status into an unsuccessful status or vice versa.

      The first example turns specific soft TLS errors into hard
      errors, by overriding the first number in the enhanced status code.

      /etc/postfix/main.cf:
      smtp_delivery_status_filter = pcre:/etc/postfix/smtp_dsn_filter

      /etc/postfix/smtp_dsn_filter:
      /^4(\.\d+\.\d+ TLS is required, but host \S+ refused to start TLS: .+)/ 5$1
      /^4(\.\d+\.\d+ TLS is required, but was not offered by host .+)/ 5$1

      The second example removes the destination command name and file
      name from local(8) successful delivery reports, so that they will
      not be reported when a sender requests confirmation of delivery.

      /etc/postfix/main.cf:
      local_delivery_status_filter = pcre:/etc/postfix/local_dsn_filter

      /etc/postfix/local_dsn_filter:
      /^(2\S+ delivered to file).+/ $1
      /^(2\S+ delivered to command).+/ $1

      This feature is supported in the lmtp(8), local(8), pipe(8), smtp(8)
      and virtual(8) delivery agents. That is, all delivery agents that
      actually deliver mail.

      The new main.cf parameters and default values are:

      default_delivery_status_filter =
      lmtp_delivery_status_filter = $default_delivery_status_filter
      local_delivery_status_filter = $default_delivery_status_filter
      pipe_delivery_status_filter = $default_delivery_status_filter
      smtp_delivery_status_filter = $default_delivery_status_filter
      virtual_delivery_status_filter = $default_delivery_status_filter

      See the postconf(5) manpage for more details.
    • Wietse Venema
      ... Now also available for the SMTP client in the stable Postfix 2.11 and 2.10 releases.
      Message 2 of 2 , Mar 22, 2014
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        Wietse Venema:
        > The Postfix delivery status filter support is complete as of
        > postfix-2.12-20140321. This can replace the delivery status codes
        > and explanatory text of successful or unsuccessful deliveries by
        > Postfix mail delivery agents.
        >
        > It was originally implemented for sites that want to turn certain
        > SMTP client soft delivery errors into hard delivery errors, but it
        > can also be used to censor out local information from delivery
        > confirmation reports.

        Now also available for the SMTP client in the stable Postfix 2.11
        and 2.10 releases.

        ftp://ftp.porcupine.org/mirrors/postfix-release/experimental/feature-patches/20140322-smtp-delivery-status-filter-patch-postfix-2.10
        ftp://ftp.porcupine.org/mirrors/postfix-release/experimental/feature-patches/20140322-smtp-delivery-status-filter-patch-postfix-2.10.sig

        ftp://ftp.porcupine.org/mirrors/postfix-release/experimental/feature-patches/20140322-smtp-delivery-status-filter-patch-postfix-2.11
        ftp://ftp.porcupine.org/mirrors/postfix-release/experimental/feature-patches/20140322-smtp-delivery-status-filter-patch-postfix-2.11.sig

        Wietse
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