-*- outline -*-

= Bug Fixes

  - Maildir delivery is unsafe.  See new
    http://cr.yp.to/proto/maildir.html

= Features

  - Mail::Deliver

    - Uniform lock handling in deliver_mbox and deliver_pipe

  - Mail::DeliveryAgent

    - Implement some kind of plugin architecture.  It can be simple,
      based on requiring files and including them into the Deliver
      class.  Or perhaps a Deliver::Plugin class to fix namespace
      issues.

    - filter method: make it work if the command starts printing
      before it
      has read the entire message.

    - forward method?

    - pipe method (lockfile attribute?)

    - ignore method (reason attribute?)

    - resend method (call it forward?)

  - Mail::DeliveryAgent#save doen't generate a DeliveryFailure for all
    possible delivery failures.  Test this.

  - Unknown

    - Implement an auto-responder.

      - Implement sender based pending queues

        The queue lives under a single directory of this structure:

            <dir>/senders/<sender-address>/msgs/<id>
            <dir>/senders/<sender-address>/meta
            <dir>/sender-count
            <dir>/lock

        Access to the entire directory is controlled by an flock on the lock
        file.  This simplifies other issues.

        The <sender-address> is a sanitized version of the actual sender
        address.  Every character outside the range of a-zA-Z and @ is HEX
        encoded.


      - Content

        From: field set to the user that received the mail.  This
        should be configurable.  This should allow for guessing among
        several (explicitly listed) valid possibilities.

        To: indicates the recipient of the response.

        Date: indicate the date and time at which the response was
        composed.

        Subject: Auto-Re: (original subject)

        In-Reply-To: included if there was a message-id of the message.

        References: included as well.

        Context should be text/plain only.

        SMTP MAIL FROM: <>

        Auto-Submitted: auto-replied (reason)

      - When responses are sent

        Not when there is an Auto-Submitted: header with value of
        auto-replied or auto-generated.

        Not when there is a Precidence: bulk or Precidence: list header.

        Not to the same sender within a period of days (7 default).

        When a valid address for the recipient is in the To: Cc: or Bcc:
              headers.

        When the recipient is owner-*, *-request, "MAILER-DAEMON", etc
        (see procmail's FROM_DAEMON regexp).

      - Where responses are sent

        To the Return-Path: header only or _maybe_ the From_ field if
        enabled.

= Minor Features

  - ListDetector -- like Perl's Mail::ListDetector to detect if a
    message is sent to a mailing list and if so what list.