Possible architecture ?

[João Paulo Sacchetto Ribeiro Bastos]

Hey Alexandre,

You can achieve your idea setting a MySQL instance, for example, in each
one of your servers and also a Dovecot instance in each of them. Then you
can set your `imap.mymaindomain.com` server to be a imap-frontend that
performs a pre-auth step in the correct MySQL and then forwards the request
to the right Dovecot instance that performs the auth again.

Something like this:
- Request arrives in `imap.mymaindomain.com`
- Check if you host the informed domain
- Check then user domain, for example foo at A.com
- Validate user credentials in MySQL.A
- Forward the request to Dovecot.A

Regards,

João Paulo Bastos
DevOps Engineer at MAV Tecnologia
Belo Horizonte - Brazil
+55 31 99279-7092
@joaopaulosr at OFTC/Freenode


On Wed, Oct 3, 2018 at 10:42 AM Alexandre Ellert <ellertalexandre at gmail.com>
wrote:

> Hi,
>
> I've got no answer.. Can someone please help ?
>
> Thank you.
>
> Alex
>
> Le mar. 18 sept. 2018 à 22:55, Alexandre Ellert <ellertalexandre at gmail.com>
> a écrit :
>
>> Hi,
>>
>> I'd like to achieve the following setup whit dovecot using multiple
>> servers :
>> - one server dedicated to all client IMAP (TLS) connections (i
>> <http://mail.numeezy.com>map.mymaindomain.com, see below )
>> - each backend server has it's own local storage. no replication
>> - each backend server responsible of a few domains
>> - each backend server has it's own Mysql local database for user's
>> passwords.
>>
>>                                                        ===> Server 1 :
>> domains A, B and C
>>
>> ====> i <http://mail.numeezy.com>map.mymaindomain.com  ===> Server 2 :
>> domains D, E and F
>>              (143 TLS / 993 SSL)
>>                                                         ===> Server 3 :
>> domains G, H
>>
>> For example, if a user connects from domain E to i
>> <http://mail.numeezy.com>map.mymaindomain.com, will Dovecot be able to
>> use password database hosted on Server 2 ?
>>
>> Thank you !
>>
>> Alex
>>
>
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