Is atomic MOVING of messages between IMAP folders possible?

[Reindl Harald]

Am 04.08.2014 um 14:00 schrieb Timo Sirainen:
> On 04 Aug 2014, at 10:44, Greg Sullivan <greg.sullivan at sullivang.net> wrote:
> 
>> I would like to use a shared IMAP account, with multiple users accessing it
>> simultaneously.  The users would take ownership of messages by first
>> attempting to MOVE the messages from the Inbox,  into their private IMAP
>> folder, still within the same account. Now, since there will be multiple
>> users competing for the same messages, I naturally want only ONE of the
>> simultaneous moves to be successful at a time.
>>
>> So far, this isn't working. If I do the move from two clients,
>> simultaneously, the messages can go to *both *destination folders -
>> duplicates can result.
>>
>> Is it possible to configure Dovecot and/or an IMAP client to behave the way
>> I want it to? If the answer to this is YES, then I'll offer my config
>> details. If the answer is NO, the next question is - do any email systems
>> at all behave the way I want? (I tried a hosted Exchange/OWA service - it
>> has the same problem)
> 
> Dovecot doesn't even attempt to do atomic MOVEs. I don't think any server will. If you can change the client code, you could use CONDSTORE instead, which does give atomic STOREs.

Internet Message Access Protocol (IMAP) - MOVE Extension
http://tools.ietf.org/html/rfc6851

well, both, client and server would need to support it
rely on that is unlikely for many years

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