Migrating to Kolab using redirection

[Jan Kowalsky]

Hi Mathias,

> In our organization we would like to migrate to Kolab from the ancient
> FirstClass. Since we have a large number of users, we would like to
> move them a small number at a time. This is the scenario:
> 
> 1. We would like to forward a select number of mailboxes to the Kolab
> server which is created with the domain: domain.com [1].
> 
> 2. We therefore create a subdomain kolab.domain.com [2] with a
> separate MX record
> 
> 3. We setup a rule in FirstClass to forward mail to
> name at kolab.domain.com
> 
> Kolab <-------------------- FirstClass <--- Internet
> kolab.domain.com [2] <- domain.com [1]
> 
> 4. The mail is forwarded and put in the users' Kolab mailbox
> 
> 5. The user responds to the email and get the sender address
> name at domain.com
> 
> 6. The mail gets sent via Postfix in a smart host config through the
> original server.
> 
> Kolab---------------------> FirstClass
> 
> user at domain.com -> user at domain.com -> Internet
> 
> 7. When all users are migrated, the domain kolab.domain.com [2] can be
> removed
> 
> My plan was to setup the Kolab-server as domain.com [1] and then add
> the kolab.domain.com [2] subdomain. I've tried to do this but got an
> authentication error for the user at kolab.domain.com user.. Is there
> something else I have to do than doing what
> https://docs.kolab.org/howtos/multi-domain.html [3] says?

did you notice that there is an additionally step if the parent domain
has an domain alias?

"For each parent domain that holds an alias domain name space, you are
required to create a copy of each of the configured mydestination,
local_recipient_maps, virtual_alias_maps and transport_maps lookup
tables, and adjust its settings to match the parent domain name space
and alias domain name spaces."

I don't know if this is true in your case ...

Further I can remember that I got problems to configure triple component
domains like subdomain.domain.com. The solution for me was to add an
configuration section for this specific domain in kolab.conf like:

[subdomain.domain.com]

;... your configs

without this sections the tripple component domain did not work. Maybe
this is a hint for you ...

search the mailing list, I remember some threads in the part about
domains with three components and parent domains with aliases.

Regards
Jan