Mailbox alias plugin and INBOX. folders

[James White]

Hi,

I'm trying to workaround the lack of IMAP folder mapping settings on
Windows 10 Mobile in regards to controlling the Sent, Trash etc folder
my device uses. Currently, my device creates its own "Sent Items" folder
"Deleted Items" folder along with others, this is pain when using
clients like Thunderbird which places such them in the correct places,
because it can be configured this way.

While this is a Microsoft issue, its looking very unlikely they will add
IMAP mapping control, as its been like this since Windows Phone 7. So I
was looking for performing a workaround at the server level.

I came across the Dovecot Mailbox alias plugin, which sounds like a
decent workaround, to at least allow sent email messages from my Windows
10 mobile device to show up in the right place, I'm aware of the
potential for double cache etc, but I have enough storage for it.

http://wiki2.dovecot.org/Plugins/MailboxAlias

What I'm having difficulty with, is expressing the mailbox_alias to an
existing INBOX. folder. My email server uses the INBOX prefix setup, so
my configured folders are:

INBOX\INBOX.Sent
INBOX\INBOX.Drafts
INBOX\INBOX.Trash
INBOX\INBOX.Spam

Most examples seem to indicate doing at the root folder level i.e. Sent
Items -> Sent not Sent Items -> INBOX\INBOX.Sent.

Is it possible to use the alias plugin in this way? If so how would I
express this using mailbox_alias_old, I tried INBOX/Sent, but this seems
to send all items to a blackhole, as they can no longer be found in any
folder.

It does appear to work at the root folder level, but as my setup is
using the older INBOX prefix, I don't want to do that.

Any hints/tips would be appreciated!

Thanks,

James

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