dovecot - Feb 2023 - Could not override "mail_location" with "userdb_mail" statment in "/etc/passwd"

> On 13/02/2023 11:36 EET Xavier <xavier-mlist at proton.me> wrote:
> 
> 
> Hi,
> 
> ** Using Dovecot 2.2.22 and Postfix 3.1.0 **
> 
> I plan to migrate all accounts on my server from mbox to maildir storage
but before i want to make some tests on dedicated accounts. To do so i want to
overide the general "mail_location" ( mail_location =
mbox:~/mail:INBOX=/var/mail/%u ) with "maildir:~/Maildir" only for
some test accounts.
> 
> To do so i modified my "/etc/passwd" file using something like
that :
> 
>
testm2m_mydomain.tld:x:2122:2122::/home/mail/testm2m_mydomain.tld:/bin/false:userdb_mail=maildir:~/Maildir
> Also tried
>
testm2m_mydomain.tld:x:2122:2122::/home/mail/testm2m_mydomain.tld:/bin/false::userdb_mail=maildir:~/Maildir
> 
> And as mentioned in the doc (https://wiki.dovecot.org/LDA/Postfix) i added
-d "$USER" in my Postfix "mailbox_command" but it don't
seem to work (my new mail_location for this test user is is not taken into
account).
> 
> When i try to make an "doveadm user testm2m_mydomain.tld" i get
this :
> 
> 8<--------------------------------
> field value
> uid 2122
> gid 2122
> home /home/mail/testm2m_mydomain.tld
> mail mbox:~/mail:INBOX=/var/mail/testm2m_mydomain.tld
> system_groups_user testm2m_mydomain.tld
> 8<--------------------------------
> 
> My modification is not taken into account ...
> 
> Any help is welcome !
> 
> /Xavier
Hi!

You need to use passwd-file driver. I would recommend adding secondary userdb
for overrides in a separate file instead of modifying /etc/passwd.

userdb {
  driver = passwd
  result_success = continue-ok
}

userdb {
  driver = passwd-file
  args = /etc/dovecot/overrides
}

and put in overrides

testm2m_mydomain.tld:::::::userdb_mail=maildir:~/Maildir

Aki

> You need to use passwd-file driver. I would recommend adding secondary
userdb for overrides in a separate file instead of modifying /etc/passwd.
>
> userdb {
> driver = passwd
> result_success = continue-ok
> }
>
> userdb {
> driver = passwd-file
> args = /etc/dovecot/overrides
> }
>
> and put in overrides
>
> testm2m_mydomain.tld:::::::userdb_mail=maildir:~/Maildir
Hi Aki,

Thanks for your answer !

I've just gived a try and it works partially :

- the "userdb_mail=maildir:~/Maildir" is well taken into account for
my user in "/etc/dovecot/overrides" (testm2m_mydomain.tld)

BUT

- all other accounts (located in "/etc/passwd" and not in
"/etc/dovecot/overrides") could not connect anymore to the Dovecot
server (POP/IMAP...). I got this kind of message in mail mail.log :

8<------------------------------
Feb 13 21:58:14 mail dovecot: imap: Error: Authenticated user not found from
userdb, auth lookup id=2769158145 (client-pid=27095 client-id=1)
Feb 13 21:58:14 mail dovecot: imap-login: Internal login failure (pid=27095
id=1) (internal failure, 1 successful auths): user=<xavier_mydomain.tld>,
method=PLAIN, rip=x.x.x.x, lip=y.y.y.y, mpid=27096, secured,
session=<N2VZZ4v0oNABJ3LB>
8<------------------------------

Any idea ?

Thanks for your help !

/Xavier
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