On 09/06/2025 13:35 EEST Brent Clark via dovecot <dovecot@dovecot.org> wrote:

Good day everyone,

I’m trying to authenticate against a constant database (CDB) file.

After reading the /cdb_path/ description in the 2.4.1 manual (⟨https://doc.dovecot.org/2.4.1/core/summaries/settings.html#cdb_path⟩ <https://doc.dovecot.org/2.4.1/core/summaries/settings.html#cdb_path%E2%9F%A9>) I added the following to the conf file.:

|passdb cdb { cdb_path = /srv/mail/passwd.cdb } userdb cdb { cdb_path = /srv/mail/passwd.cdb } |

But dovecot says

|auth: Fatal: Unknownpassdb driver 'cdb'|

dovecot --version 2.4.1-4+debian11 (7d8c0e5759)

I cant see anything in the changelogs. Is the “cdb” driver still available in 2.4.1, or was it renamed/removed?

Any pointers (or a minimal working example) would be greatly appreciated.

Kind Regards Brent ClarkGood day everyone, I’m trying to authenticate against a constant database (CDB) file. After reading the cdb_path description in the 2.4.1 manual (⟨https:// doc.dovecot.org/2.4.1/core/summaries/settings.html#cdb_path⟩) I added the following to the conf file.: passdb cdb { cdb_path = /srv/mail/passwd.cdb }

userdb cdb { cdb_path = /srv/mail/passwd.cdb }

But dovecot says auth: Fatal: Unknown passdb driver 'cdb'

dovecot --version 2.4.1-4+debian11 (7d8c0e5759)

I cant see anything in the changelogs. Is the “cdb” driver still available in 2.4.1, or was it renamed/removed?

Any pointers (or a minimal working example) would be greatly appreciated.

Kind Regards Brent Clark

Hi,

I don't think cdb has ever been a directly supported passdb/userdb. It was supported with dict driver, which has been removed.

This is mentioned in the upgrading 2.3 -> 2.4 page,

Dict passdb & userdb driver Use Lua authentication database instead.

so if you want to continue with cdb, you should switch to lua. Or you can use sqlite instead.

Aki