Am 2018-05-24 um 07:38 schrieb Roger Klorese:
If John Doe dies and a new John Doe is born, they’re not the same person, are they?

They can even coexist, hundreds at a time. That is not a good analogy.

Peter

On Wed, May 23, 2018 at 10:37 PM Aki Tuomi <aki.tu...@dovecot.fi <mailto:aki.tu...@dovecot.fi>> wrote:

    That's rather difficult semantic question.

    Aki


    On 24.05.2018 08:35, Roger Klorese wrote:
    If something deletes and recreates the folder, it’s not really the
    folder to which you subscribed, is it?!
    On Wed, May 23, 2018 at 10:33 PM Aki Tuomi <aki.tu...@dovecot.fi
    <mailto:aki.tu...@dovecot.fi>> wrote:

        I understand that reading that paragraph makes it sounds
        obscure and outdated. But the problem is that if something
        deletes & recreates your folder, while you were gone, you
        would lose the subscription. This includes other MUAs that are
        in no way obligated to resubscribe to the folder if they do this.

        Aki


        On 23.05.2018 23:13, Rupert Gallagher wrote:
        Sorry for top posting, my client is still broken.

        I have never seen the ghost of a "system-alerts" or similar
        "well-known" mail folder in the past 30 years.

        Compliance with an RFC obscure feature is compellong us
        all to clear subscriptions fol ders by hand.

        As we meet the problem over and over again, a non-RFC
        configuration option could solve the problem, and it would be
        very much appreciated...


        On Wed, May 23, 2018 at 11:57, Aki Tuomi
        <aki.tu...@dovecot.fi <mailto:aki.tu...@dovecot.fi>> wrote:

        > On 23.05.2018 12:31, Rupert Gallagher wrote:
        Dovecot does not clear the subscription file from
        non-existent folders.

        Hi!

        Thank you for your bug report. Unfortunately this is not a
        BUG, but mandated behavior by RFC3501, see last two
        paragraphs in the excerpt.

        Aki Tuomi

        6.3.6.  SUBSCRIBE Command

           Arguments:  mailbox

           Responses:  no specific responses for this command

           Result:     OK - subscribe completed
                       NO - subscribe failure: can't subscribe to
        that name
                       BAD - command unknown or arguments invalid

              The SUBSCRIBE command adds the specified mailbox name
        to the
              server's set of "active" or "subscribed" mailboxes as
        returned by
              the LSUB command.  This command returns a tagged OK
        response only
              if the subscription is successful.

              A server MAY validate the mailbox argument to
        SUBSCRIBE to verify
              that it exists.  However, it MUST NOT unilaterally
        remove an
              existing mailbox name from the subscription list even
        if a mailbox
              by that name no longer exists.

                   Note: This requirement is because a server site can
                   choose to routinely remove a mailbox with a
        well-known
                   name (e.g., "system-alerts") after its contents
        expire,
                   with the intention of recreating it when new
        contents
                   are appropriate.


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