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

[Eliezer Croitoru]

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

-- 
Eliezer Croitoru
https://www1.ngtech.co.il
IT consulting for Nonprofit organizations
elilezer <at> ngtech.co.il