Investigate the opportunity of supporting the IMAP MOVE command RFC 6851

Many bugs are created because when messages are moved in IMAP folders, the implementation relies on a Delete + Copy
(see e.g. MNT-12420 MNT-12259 ALF-12579)

In
https://issues.alfresco.com/jira/browse/ALF-12579?focusedCommentId=146509&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-146509
we can read "I don't think IMAP has the concept of move."

It is correct that IMAP RFC2060 does not provide a 'move' functionality.
However there is a RFC that proposes a MOVE command:

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

I see that some other IMAP mail servers support it e.g. Dovecot:

>>> BGKJ2 CAPABILITY
<<< * CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE IDLE SORT SORT=DISPLAY THREAD=REFERENCES THREAD=REFS THREAD=ORDEREDSUBJECT MULTIAPPEND URL-PARTIAL CATENATE UNSELECT CHILDREN NAMESPACE UIDPLUS LIST-EXTENDED I18NLEVEL=1 CONDSTORE QRESYNC ESEARCH ESORT SEARCHRES WITHIN CONTEXT=SEARCH LIST-STATUS SPECIAL-USE BINARY MOVE
<<< BGKJ2 OK Capability completed.

Could we please investigate the opportunity of implementing this, in particular to have cleaner Moves.

I an not sure also what client already support this:
it seems Thunderbird does:
see e.g
https://bugzilla.mozilla.org/show_bug.cgi?id=857699
but a search for +Outlook +"RFC 6851" did not give a clear answer if Outlook supports this or not yet.