MBOX-Line: From spang at inboxapp.com  Wed Jul 16 19:29:53 2014
To: imap-protocol@u.washington.edu
From: Christine Spang <spang@inboxapp.com>
Date: Fri Jun  8 12:34:53 2018
Subject: [Imap-protocol] Gmail IMAP and X-GM-MSGID
Message-ID: <CAMMeFX5dySxGS4XwxW=zyt_J+qxq++T=_Tt4DGVKAKhztJ8ZMA@mail.gmail.com>

I know that some of the Gmail IMAP devs are on this list, so might be a
good place to ask a few questions about what assumptions one can make about
X-GM-MSGID with Gmail IMAP.

* Is X-GM-MSGID globally unique across all of Gmail? (I assume no, given
sharding.)
* Can the same message in different accounts have the same X-GM-MSGID?
* Do X-GM-MSGID values associated with messages ever change? (Based on the
Gmail API docs about messageId, seems not?)

--Christine
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