LMTP Post login script for acl_groups

[lists at mlserv.org]

> Am 28.08.2019 um 20:02 schrieb Aki Tuomi via dovecot <dovecot at dovecot.org>:
> 
> 
>> On 28/08/2019 21:01 R.N.S. via dovecot <dovecot at dovecot.org> wrote:
>> 
>> 
>>> Am 28.08.2019 um 19:46 schrieb Jakobus Schürz via dovecot <dovecot at dovecot.org>:
>>> 
>>> I think, i had the same problem as you.
>>> 
>>> When dovecot runs lmtp, no user is logged in, so there is no user from
>>> which you can get groups. So i think, my solution is (not really sure,
>>> if this is right, it's a long time ago, i played around) this transport
>>> in exim for local delivery
>>> 
>>> dovecot_delivery:             
>>>  debug_print = "T: dovecot_delivery_pipe for $local_part@$domain
>>> translates to GET_LOCAL_MAIL"
>>>  driver = pipe               
>>>  command = /usr/lib/dovecot/deliver -d "GET_LOCAL_MAIL"
>>>  message_prefix =
>>>  message_suffix =
>>>  delivery_date_add
>>>  envelope_to_add             
>>>  return_path_add             
>>>  log_output
>>>  user = MAILUSER
>>>  group = MAILUSER
>>> 
>>> I have a really sophisticated setup with ldap... so GET_LOCAL_MAIL and
>>> MAILUSER are makros which get the email-adress and the mailuser for the
>>> receiving emailadress.
>>> 
>>> GET_LOCAL_MAIL could be $local_part@$domain
>>> MAILUSER is vmail in my setup, the user who owns all mailboxes
>>> 
>>> /usr/lib/dovecot/deliver is an alternative for the lmtp-delivery.
>> 
>> Unfortunately this way Postfix and Dovecot need to run on the same host.
>> 
>> I wonder, if this is a LMTP or Sieve issue. Maybe something can be done in sieve configuration to solve this?
>> 
>> Is there nobody from @Dovecot who could give some feedback :-) please :-)
>> 
>> Thanks
>> 
>> Christian
> 
> It could be possible to solve this with auth lua script that would allow returning the acl groups as a string, instead of using post-login script.

Does that mean, I would give a second userdb with a Lua script?

Can I combine LDAP and Lua backends? Are both read together or is it a first-match-wins decision?

Christian