Re: Configuration upgrade tool

28 Jan 2026


      Hi Aki,
I tried it with our configuration and it failed and asked to contact the
list ;)
Here's my configuration:
2.3.21.1 (d492236fa0): /etc/dovecot/dovecot.conf
Pigeonhole version 0.5.21.1 (49005e73)
OS: Linux 6.8.0-88-generic x86_64 Ubuntu 20.04.6 LTS
Hostname: 1307e47933b7
auth_cache_negative_ttl = 2 mins
auth_cache_size = 10 M
auth_cache_ttl = 5 mins
auth_master_user_separator = *
auth_mechanisms = plain login
auth_username_chars =
"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890.-_@#"
default_client_limit = 3500
default_process_limit = 512
disable_plaintext_auth = no
doveadm_port = 26
first_valid_uid = 90
listen = *
lmtp_rcpt_check_quota = yes
log_path = /dev/stderr
login_greeting = Dovecot FRA.pvt ready
mail_access_groups = dovecot
mail_attribute_dict = file:%h/dovecot-metadata
mail_gid = dovecot
mail_location = mdbox:~/mdbox
mail_log_prefix = "%s(%u %p): "
mail_max_userip_connections = 200
mail_plugins = acl quota notify replication mail_log mail_lua notify
push_notification push_notification_lua
mail_uid = dovecot
managesieve_notify_capability = mailto
managesieve_sieve_capability = fileinto reject envelope
encoded-character vacation subaddress comparator-i;ascii-numeric
relational regex imap4flags copy include variables body enotify
environment mailbox date ihave vnd.dovecot.debug
mbox_min_index_size = 1000 B
mbox_write_locks = fcntl
mdbox_rotate_size = 50 M
namespace inboxes {
inbox = yes
location =
mailbox Drafts {
auto = subscribe
special_use = \Drafts
}
mailbox Junk {
auto = subscribe
special_use = \Junk
}
mailbox Sent {
auto = subscribe
special_use = \Sent
}
mailbox Templates {
auto = subscribe
}
mailbox Trash {
auto = subscribe
special_use = \Trash
}
prefix = INBOX/
separator = /
subscriptions = no
}
namespace subs {
hidden = yes
list = no
location =
prefix =
separator = /
}
namespace users {
location = mdbox:%%h/mdbox:INDEXPVT=~/shared/%%u
prefix = user/%%n/
separator = /
subscriptions = no
type = shared
}
passdb {
args = /etc/dovecot/dovecot-dict-master-auth.conf
driver = dict
master = yes
}
passdb {
args = /etc/dovecot/dovecot-dict-auth.conf
driver = dict
}
plugin {
acl = vfile
acl_shared_dict = file:/var/dovecot/imap/%d/shared-mailboxes.db
mail_log_events = delete undelete expunge copy mailbox_delete
mailbox_rename
mail_log_fields = uid box msgid size
push_lua_url = http://push-proxy/
push_notification_driver = lua:file=/etc/dovecot/dovecot-push.lua
quota = dict:User quota::ns=INBOX/:file:%h/dovecot-quota
quota_rule = *:storage=200GB
sieve = ~/sieve/dovecot.sieve
sieve_after = /var/dovecot/sieve/after.d/
sieve_before = /var/dovecot/sieve/before.d/
sieve_dir = ~/sieve
sieve_extensions = +editheader +vacation-seconds
sieve_redirect_envelope_from = orig_recipient
sieve_user_log = ~/.sieve.log
sieve_vacation_min_period = 1s
}
postmaster_address = admins@egroupware.org
protocols = imap pop3 lmtp sieve
service auth-worker {
user = $default_internal_user
}
service auth {
drop_priv_before_exec = no
inet_listener {
port = 113
}
}
service doveadm {
inet_listener {
port = 26
}
vsz_limit = 640 M
}
service imap-login {
inet_listener imap {
port = 143
}
inet_listener imaps {
port = 993
ssl = yes
}
process_min_avail = 5
service_count = 1
vsz_limit = 64 M
}
service imap {
executable = imap
process_limit = 2048
vsz_limit = 640 M
}
service lmtp {
inet_listener lmtp {
port = 24
}
unix_listener lmtp {
mode = 0666
}
vsz_limit = 512 M
}
service managesieve-login {
inet_listener sieve {
port = 4190
}
inet_listener sieve_deprecated {
port = 2000
}
}
service pop3-login {
inet_listener pop3 {
port = 110
}
inet_listener pop3s {
port = 995
ssl = yes
}
}
service pop3 {
executable = pop3
}
service postlogin {
executable = script-login -d rawlog -b -t
}
ssl_cert = </etc/certs/mail.egroupware.org.pem
ssl_cipher_list =
ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384
ssl_dh = # hidden, use -P to show it
ssl_key = # hidden, use -P to show it
submission_host = fra-node-pool-internal.k8s.farm.egroupware.org:25
userdb {
args = /etc/dovecot/dovecot-dict-auth.conf
driver = dict
}
verbose_proctitle = yes
protocol lda {
mail_plugins = acl quota notify replication mail_log mail_lua notify
push_notification push_notification_lua acl sieve quota
}
protocol imap {
imap_metadata = yes
mail_max_userip_connections = 200
mail_plugins = acl quota notify replication mail_log mail_lua notify
push_notification push_notification_lua acl imap_acl quota imap_quota
}
protocol lmtp {
mail_max_lock_timeout = 25 secs
mail_plugins = acl quota notify replication mail_log mail_lua notify
push_notification push_notification_lua acl sieve quota notify
push_notification
}
Am 28.01.26 um 09:07 schrieb Aki Tuomi via dovecot:
...
Hi!
To make migrating from Dovecot 2.3 to 2.4 a bit easier, we are now providing a tool that helps upgrade your existing configuration. The tool allows you to upload either a full dovecot.conf or selected ancillary configuration files from a 2.3 setup, and will attempt to convert them accordingly.
You can find the tool here:
https://dovecot.org/upgrader/
We do not store any of the configurations processed by the tool, nor do we track who uses it. It's offered as-is, without any warranty or guarantee.
If you run into any issues, unexpected results, or have feedback about the tool, please let us know — it’s very much appreciated.
Please note that the tool can make mistakes, so we strongly recommend carefully reviewing and testing the output before using it in production.
There are currently no plans to release this tool as open source.
Regards,
Aki Tuomi
Open-Xchange oy

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