CREATE INBOX/attention: NO Invalid mailbox name

[Jo Rhett]

Marten Lehmann wrote:
> Hello,
> 
>>> ok, then I have to rename them manually.
>>
>> Rename what manually?   Seriously, are you considering the problem 
>> correctly?
> 
> I mean that I have to rename the INBOX/* folders before the migration.

Why?

If the problem is that Dovecot uses the folders below inbox, then do the 
migration and *THEN* enable altnamespace.  Simple! :-)