How to import an mbox to an existing user as a new mailbox

[Paul Hoffman]

On 3 Aug 2015, at 7:16, Steffen Kaiser wrote:

> On Mon, 3 Aug 2015, Paul Hoffman wrote:
>> On 2 Aug 2015, at 23:27, Steffen Kaiser wrote:
>>> On Sun, 2 Aug 2015, Paul Hoffman wrote:
>>>
>>>> Greetings. I have a bunch of mbox files that I want to import to an 
>>>> existing user, each into a new mailbox. That is, I want to import 
>>>> the file project1.mbox to user Foo, into a newly-created mailbox 
>>>> called "Project 1". Is there a dovecot tool to do this on the 
>>>> server?
>>>
>>> do you have access to the file system of the mail storage? Can you 
>>> call doveadm on the server? What mail storage do you use now, 
>>> Maildir, mbox, ... ?
>>
>> Sorry for being unclear earlier. Yes, yes, mbox.
>
> copy project1.mbox to '/path/to/user/mail/storage/Project 1.mbox' and 
> make sure, the user has file system rights to access the file at all.
>
> Maybe, you need to add the new mailbox to the user's subscription 
> file, in order to have it show up.

After a week, I'm at this again. Now having read up on doveadm, I am 
trying the following:

   sudo doveadm import -u Foo mbox:/home/phoffman/project1.mbox "Project 
1" all

However, that gets the result:

   Initializing mail storage from mail_location parameter failed: mbox: 
mbox root directory can't be a file

Which bit am I missing here?

--Paul Hoffman