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Admin: Changing digest format.

  • 1.  Admin: Changing digest format.

    Posted 09-05-2008 10:56
    For those members of the cognet mailing list who receive the messages
    in Digest form there will be some substantial changes. We are
    changing the default digest form from "tradition" (or legacy) to
    MIME. Every modern email program should be able to handle MIME
    digests, but if you are not familiar with what it looks like, it will
    be bit strange and will take some learning to navigate. Please have
    patience with it.

    Also note that this is just a default setting. You may still request
    traditional digests on your subscription preferences page (start from http://aomlists.pace.edu/
    and follow links and login instructions from there).

    Fabio and I aren't certain at this point whether the changes to the
    default will affect current digest users or just new members. If you
    are still getting traditional digests, I recommend that you switch to
    MIME Digests unless you have a very good reason not to. Please read
    below for a somewhat rambling description of what MIME Digests are and
    why they are a good idea for most users. (I tried to find a web page
    that described this, but couldn't, so I quickly spewed out the
    following).

    With traditional digests all of the messages were catenated "raw" into
    a larger message that got sent out daily to digest subscribers. This
    worked fine in the days when all email was in US-ASCII and perfectly
    readable that way. But over the past 20 years, newer ways of handling
    mail allow mail to be sent using different character sets. Now this
    is where things get tricky. The mail *transport* systems still insist
    that the stuff being transmitted by US-ASCII (and there are good
    reasons for that). So the solution has been to use an "encoding" to
    pack things like UTF-8 or ISO-8859-X into something that the transport
    system likes.

    One kind of encoding (which works for ISO-8859-X but not for UTF-8) is
    something called "quoted-printable". This is the one with all of the
    "=20"s in it. Often these are readable, with effort, if you are
    confronted with it raw. But for other things, an encoding like base64
    is used. These are not readable by humans.

    Now when a Digest is put together the different messages in it may
    have different requirements. Some parts may be in US-ASCII, some
    parts might be in base64 and other parts might be in quoted-
    printable. Traditional digests simply stick them all together raw.

    A MIME digest will create a special kind of message (called a MIME
    Digest). You can think of a MIME Digest as an email message that has
    a whole bunch of attachments, each of which is an email message. Each
    individual attachment (email message) can have its own MIME type and
    transfer encoding for its content. And your mailer should do the
    right thing with each individual one.

    Another advantage of MIME Digests is that when you open an individual
    message within a digest, you can respond to that specific message
    (with its original subject and just quoting that particular message).
    Also, you can save those individual messages in a digest individually.

    So expect some changes. It will take some getting used to, but it is
    worth it.

    -j


    --
    Jeffrey Goldberg http://www.goldmark.org/jeff/

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