<div>Sorry for top posting, my client is still broken. </div>
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<div>I have never seen the ghost of a "<span style="background-color: rgba(255, 255, 255, 0);">system-alerts" or similar "well-known" mail folder in the past 30 years. </span>
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<div><span style="background-color: rgba(255, 255, 255, 0);"><br /></span>
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<div><span style="background-color: rgba(255, 255, 255, 0);">Compliance with an RFC obscure feature is compellong us all to </span><span style="background-color: rgba(255, 255, 255, 0);">clear </span><span style="background-color: rgba(255, 255, 255, 0);">subscriptions fol</span>
<span
style="background-color: rgba(255, 255, 255, 0);">ders by hand. </span>
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<div><span style="background-color: rgba(255, 255, 255, 0);"><br /></span>
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<div><span style="background-color: rgba(255, 255, 255, 0);">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...</span>
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<div>On Wed, May 23, 2018 at 11:57, Aki Tuomi <<a href="mailto:aki.tuomi@dovecot.fi" class="">aki.tuomi@dovecot.fi</a>> wrote:</div>
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<div>> On 23.05.2018 12:31, Rupert Gallagher wrote:
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<blockquote class="protonmail_quote" type="cite">
<blockquote type="cite" cite="mid:zQtYpyAyiDeYzri3miX1VsgsTmaWrXEG5FmsqSgAPZAH9zQXIWG7MeUnDprshLaPTwJAMyuqoGz4aFzGiQLq63mK7McIgpFWsTXlooGtArw=@protonmail.com">
<div><span style="background-color: rgba(255, 255, 255, 0);">Dovecot
does not clear the subscription file from non-existent
folders. </span>
</div>
</blockquote>
<br />Hi!
<br />
<br />Thank you for your bug report. Unfortunately this is not a BUG, but mandated behavior by RFC3501, see last two paragraphs in the excerpt.
<br />
<br />Aki Tuomi
<br />
<br />6.3.6. SUBSCRIBE Command
<br />
<br /> Arguments: mailbox
<br />
<br /> Responses: no specific responses for this command
<br />
<br /> Result: OK - subscribe completed
<br /> NO - subscribe failure: can't subscribe to that name
<br /> BAD - command unknown or arguments invalid
<br />
<br /> The SUBSCRIBE command adds the specified mailbox name to the
<br /> server's set of "active" or "subscribed" mailboxes as returned by
<br /> the LSUB command. This command returns a tagged OK response only
<br /> if the subscription is successful.
<br />
<br /> A server MAY validate the mailbox argument to SUBSCRIBE to verify
<br /> that it exists. However, it MUST NOT unilaterally remove an
<br /> existing mailbox name from the subscription list even if a mailbox
<br /> by that name no longer exists.
<br />
<br /> Note: This requirement is because a server site can
<br /> choose to routinely remove a mailbox with a well-known
<br /> name (e.g., "system-alerts") after its contents expire,
<br /> with the intention of recreating it when new contents
<br /> are appropriate.
<br />
</blockquote>
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