42 lines
1.5 KiB
Plaintext
42 lines
1.5 KiB
Plaintext
MBOX-Line: From blong at google.com Thu Jul 17 15:05:19 2014
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To: imap-protocol@u.washington.edu
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From: Brandon Long <blong@google.com>
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Date: Fri Jun 8 12:34:53 2018
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Subject: [Imap-protocol] Gmail IMAP and X-GM-MSGID
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In-Reply-To: <CAMMeFX5dySxGS4XwxW=zyt_J+qxq++T=_Tt4DGVKAKhztJ8ZMA@mail.gmail.com>
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References: <CAMMeFX5dySxGS4XwxW=zyt_J+qxq++T=_Tt4DGVKAKhztJ8ZMA@mail.gmail.com>
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Message-ID: <CABa8R6sB8Hg3zeY7htPXGuQq0R3Rg9CMi31eWpZa3CyeBf4N+w@mail.gmail.com>
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On Wed, Jul 16, 2014 at 7:29 PM, Christine Spang <spang@inboxapp.com> wrote:
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> I know that some of the Gmail IMAP devs are on this list, so might be a
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> good place to ask a few questions about what assumptions one can make about
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> X-GM-MSGID with Gmail IMAP.
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>
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> * Is X-GM-MSGID globally unique across all of Gmail? (I assume no, given
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> sharding.)
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>
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No.
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> * Can the same message in different accounts have the same X-GM-MSGID?
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>
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Yes, though fairly unlikely.
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> * Do X-GM-MSGID values associated with messages ever change? (Based on the
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> Gmail API docs about messageId, seems not?)
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>
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Only in the case of a complete account re-build, which is exceedingly rare.
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Maybe 100 times in the history of Gmail? And given the current message
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store, probably not likely to happen every again (but never say never).
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For the API, maybe we should have a UIDVALIDITY equivalent just in case.
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Brandon
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