52 lines
1.9 KiB
Plaintext
52 lines
1.9 KiB
Plaintext
MBOX-Line: From brong at fastmail.fm Mon Jan 25 15:41:35 2016
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To: imap-protocol@u.washington.edu
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From: Bron Gondwana <brong@fastmail.fm>
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Date: Fri Jun 8 12:34:55 2018
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Subject: [Imap-protocol] Selected mailbox deleted by another client
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In-Reply-To: <20160125231528.GA21616@mew>
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References: <20160125231528.GA21616@mew>
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Message-ID: <1453765295.487330.502398698.1C26076F@webmail.messagingengine.com>
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On Tue, Jan 26, 2016, at 10:15, Omar Sandoval wrote:
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> I haven't actually tried it, but Dovecot apparently disconnects the
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> client [2].
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>
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> So, what's the correct behavior here? I'm a fan of the behavior I quoted
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> above, and the Dovecot behavior also seems sane. Gmail's behavior seems
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> utterly incorrect, however. NOOP is definitely not supposed to change
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> the connection state, so this appears to be a bug. Any thoughts?
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Cyrus has a switch called 'disconnect_on_vanished_mailbox' which gives
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the same behaviour as Dovecot. It defaults to off, but my testing just now
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showed an immediate disconnect without even running the NOOP when I
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ran the command, so I'll be investigating that (and adding a test case to
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our testing framework)
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Thanks for bringing this up :)
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What Cyrus is supposed to do is to issue an EXPUNGE for every existing
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message (or a VANISHED if QRESYNC is turned on) and then a NO in
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response to the command. You would remain "selected" though.
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I guess you could return:
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<tag> NO [CLOSED] Mailbox no longer exists
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If QRESYNC is enabled...
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https://tools.ietf.org/html/rfc5162#section-3.7
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Another possible thing (and what Cyrus IMAP used to do for a little while
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in the 2.4 series when I added long-lived index locks) is to say
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"NO Mailbox is locked" to the session which tries to delete an open
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mailbox. This was bad because the situation actually occurs quite often
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in practice that someone's phone or desktop is sitting there with a mailbox
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open for hours or days just NOOPing away.
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Bron.
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--
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Bron Gondwana
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brong@fastmail.fm
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