MBOX-Line: From johngalton217 at gmail.com  Tue Mar 20 11:34:17 2012
To: imap-protocol@u.washington.edu
From: John Galton <johngalton217@gmail.com>
Date: Fri Jun  8 12:34:48 2018
Subject: [Imap-protocol] CONDSTORE mod-sequence values
Message-ID: <CABHfyPSq=7hOtH94aet6T=osoXmfVP94iAq6iCCYH3N+MvGmFw@mail.gmail.com>

Hello,

From RFC4551 Introduction: "The server MUST guarantee that each STORE
command performed on the same mailbox ... will get a different mod-sequence
value."

Can someone explain why the uniqueness requirement is necessary for the
modification sequence?  If two metadata items/messages are modified
transactionally and share the same mod-sequence I don't really see any way
that will break any of the proposed IMAP protocol changes for CONDSTORE (as
long as they are updated atomically and a client can't sync between when a
first item gets a mod-sequence and a second item gets the same
mod-sequence).

Thanks for your time,
John
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