Hi!
Actually those settings are valid outside namespace too. Not sure why you think
they should be inside namespace?
Aki
> On 29/09/2025 17:52 EEST Andy Baugh via dovecot <dovecot@dovecot.org> wrote:
>
>
> So, this message is pointing to the problem, it's just not obvious on first
> glance as to why. mail_driver is only a valid configuration parameter *in the
> scope of a namespace*. Both the error messages and docs do hint towards this,
> but it takes a bit of dedication to figure out.
>
> In this case it means you need those params within your "namespace inbox"
> config scope/block instead of in the global configuration. EX.
>
> namespace inbox {
> mail_driver = maildir
> mail_path = %{home}/Maildir
> ...
> }
>
> This is a bit frustrating, as it does represent a bit of behavior change; on
> 2.3, "defaults" could effectively be set for all namespaces you setup due to
> being able to set them in the global scope. On 2.4, this is no longer the
> case for many parameters, though there are exceptions to this, which is part
> of why it is frustrating to deal with.
>
> Cheers,
> --
> Thomas "Andy" Baugh | Software Development Engineer IV
> andy.ba...@webpros.com
> http://www.webpros.com/
>
> ________________________________________
> From: User via dovecot <dovecot@dovecot.org>
> Sent: Saturday, September 27, 2025 4:42 PM
> To: dovecot@dovecot.org <dovecot@dovecot.org>
> Subject: Dovecot 2.3 to 2.4 invalid Maildir settings
>
> Greetings,
>
> I am unable to completely migrate my Dovecot 2.3 config to 2.4.1 as I'm
> unable to get past the following error:
>
> Error: Namespace inbox: maildir: maildir settings: Failed to parse
> configuration: Failed to override configuration from userdb: Invalid
> maildir=${domain}/${user}/: Setting is a named filter, use 'maildir {'
>
> I found a similar encounter at
> https://www.mail-archive.com/dovecot@dovecot.org/msg90843.html that
> points to
> https://doc.dovecot.org/2.4.0/core/config/mailbox/mail_location.html#per-user-mail-locations
> yet I still can't get my config to work. I've attached my doveconf at
> the end, including the ported 2.3 settings that used to work for me
> (commented out).
>
> I would appreciate any advise.
>
> # /etc/dovecot/dovecot.conf
> dovecot_config_version = 2.4.1
> dovecot_storage_version = 2.4.1
>
> sql_driver = mysql
> mysql /run/mysqld/mysqld.sock {
> user = mail
> password = mail
> dbname = mail
> }
> passdb sql {
> query = SELECT username AS user, \
> password FROM mailbox WHERE username = '%{user}' AND active='1'
> default_password_scheme = ARGON2I
> }
> userdb sql {
> query = SELECT maildir, \
> 600 AS uid, \
> 600 AS gid \
> FROM mailbox WHERE username = '%{user}' AND active='1'
> iterate_query = SELECT username AS user FROM mailbox
> }
> # previously:
> # passdb {
> # driver = sql
> # args = /etc/dovecot/dovecot-sql.conf.ext
> # }
> # userdb {
> # driver = sql
> # args = /etc/dovecot/dovecot-sql.conf.ext
> # }
>
> # disable_plaintext_auth = yes
> auth_username_format = %{user | lower} # previously:
> "auth_username_format = %Lu"
> auth_mechanisms = plain login
> auth_default_domain = mail.com # previously: "auth_default_realm =
> mail.com"
> auth_debug = yes
> auth_debug_passwords = yes
>
> mail_privileged_group = mail
> # previously: "mail_location = maildir:~/Maildir"
> mail_driver = maildir
> mail_path = %{home}/Maildir
> mail_home = /var/vmail/%{user | domain}/%{user | username} # previously:
> "mail_home = /var/vmail/%d/%n/"
>
> service lmtp {
> unix_listener /var/spool/postfix/private/dovecot-lmtp {
> mode = 0600
> user = postfix
> group = postfix
> }
> }
> service auth {
> unix_listener /var/spool/postfix/private/auth {
> mode = 0660
> user = postfix
> group = postfix
> }
> }
> service stats {
> unix_listener stats-reader {
> user = nginx
> group = nginx
> mode = 0660
> }
> unix_listener stats-writer {
> user = nginx
> group = nginx
> mode = 0660
> }
> }
>
> ssl = required
> ssl_min_protocol = TLSv1.2
> ssl_server_prefer_ciphers = server # previously:
> "ssl_prefer_server_ciphers = yes"
> ssl_server {
> dh_file = /etc/ssl/dovecot/dh.pem
> cert_file = /etc/ssl/dovecot/tls.pem
> key_file = /etc/ssl/dovecot/tls.key
> }
> # previously:
> # ssl_dh = </etc/ssl/dovecot/dh.pem
> # ssl_cert = </etc/ssl/dovecot/tls.pem
> # ssl_key = </etc/ssl/dovecot/tls.key
>
> namespace inbox {
> inbox = yes
> mailbox Archive {
> auto = subscribe
> special_use = \Archive
> }
> mailbox Drafts {
> auto = subscribe
> special_use = \Drafts
> }
> mailbox Junk {
> auto = subscribe
> special_use = \Junk
> }
> mailbox Trash {
> auto = subscribe
> special_use = \Trash
> }
> mailbox Sent {
> auto = subscribe
> special_use = \Sent
> }
> mailbox "Sent Messages" {
> special_use = \Sent
> }
> }
>
> protocols = imap lmtp
>
> # previously: /etc/dovecot/dovecot-sql.conf.ext
> driver = mysql
> connect = host=localhost dbname=mail user=mail password=mail
> default_pass_scheme = ARGON2I
> password_query = SELECT username AS user,password FROM mailbox WHERE
> username = '%u' AND active='1'
> user_query = SELECT maildir, 600 AS uid, 600 AS gid FROM mailbox WHERE
> username = '%u' AND active='1'
> iterate_query = SELECT username AS user FROM mailbox
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