[Dovecot] Per-user IMAP enable - is it possible?

[Gedalya]

On 3/20/2012 5:45 AM, Eliezer Croitoru wrote:
> On 20/03/2012 08:18, Gedalya wrote:
>> On 3/20/2012 1:43 AM, Gedalya wrote:
>>> On 3/20/2012 1:28 AM, Alexander Chekalin wrote:
>>>> Just wonder if it is possible to enable/disable IMAP4 on Dovecot
>>>> (2.0.x as far) on per-user basis?
>>>>
>>>> The deal is simple: our policy is not to store a lot of mailing on
>>>> mailserver (the user should store it locally), thus the 'use POP3'
>>>> approach, but for a vary few users it is permitted to use IMAP4. But
>>>> users sometimes simple miss the point that some mail clients (e.g.
>>>> TB) 'prefer' to use IMAP4 first, and afterward I see mailbox full of
>>>> mailings and no local store of it on user's workstation.
>>>>
>>>> Sound too complicated, but setting up two Dovecots is not something
>>>> I'd love to do as well.
>>>>
>>>> Thank you for any ideas,
>>>> Alexander
>>> There would be various ways to do this, the specifics would depend on
>>> what kind of passdb you use.
>>>
>>> If you happen to be using a SQL database, you could do something like
>>> this: Add an allow_imap column, and change the password_query in
>>> dovecot-sql.conf.ext to something like this:
>>>
>>> password_query = SELECT password FROM user WHERE username = '%n' AND
>>> domain = '%d' \
>>> AND ('%s' != 'imap' or allow_imap=1)
>>>
>>> This would make the user appear to not exist when trying to log in via
>>> IMAP.
>>>
>>> http://wiki2.dovecot.org/Variables
>>>
>> Or like this, might be more appropriate.
>>
>> password_query = SELECT password, if('%s' != 'imap' or allow_imap=1,
>> NULL, 'y') as nologin \
>> FROM user WHERE username = '%n' AND domain = '%d'
>>
>> http://wiki2.dovecot.org/PasswordDatabase/ExtraFields/NoLogin
>>
> but this will disallow also pop3...
>
>
> Eliezer
>
No. It will return NULL unless the service is 'imap' and allow_imap != 1.
nologin=NULL has no effect, so everything is allowed.