Re: Issue connecting Windows AD ↔ Dovecot via LDAPS

24 Jan 2026


      2.4.1-4 (7d8c0e5759): /etc/dovecot/dovecot.conf
Pigeonhole version 2.4.1-4 (0a86619f)
OS: Linux 6.12.63+deb13-amd64 x86_64 Debian 13.3 ext4
Hostname: deb13
4 default setting changes since version 2.4.0
dovecot_config_version = 2.4.0
auth_mechanisms = plain login
auth_username_format = %{user|username|lower}
debug_log_path = /var/log/dovecot-debug.log
dovecot_storage_version = 2.4.0
fts_autoindex = yes
fts_autoindex_max_recent_msgs = 999
fts_search_add_missing = yes
info_log_path = /var/log/dovecot.log
ldap_base = cn=Users,dc=gr4,dc=lan
ldap_uris = ldaps://gr4.lan
log_debug = category=auth
mail_driver = mdbox
mail_gid = vmail
mail_home = /home/%{user | username}
mail_inbox_path = /var/vhosts/%{user}
mail_path = /var/vhosts/%{user}
mail_privileged_group = mail
mail_uid = vmail
protocols {
imap = yes
lmtp = yes
}
ssl = required
ssl_client {
require_valid_cert = no
}
passdb ldap {
bind = yes
bind_userdn = cn=%{user},cn=Users,dc=gr4,dc=lan
filter = (&(objectClass=user)(sAMAccountName=%{user}))
}
userdb static {
fields {
gid = vmail
uid = vmail
}
}
namespace inbox {
inbox = yes
mailbox Drafts {
special_use = "\\Drafts"
}
mailbox Junk {
special_use = "\\Junk"
}
mailbox Trash {
special_use = "\\Trash"
}
mailbox Sent {
special_use = "\\Sent"
}
mailbox "Sent Messages" {
special_use = "\\Sent"
}
}
service imap-login {
inet_listener imap {
port = 0
}
inet_listener imaps {
port = 993
ssl = yes
}
}
service pop3-login {
inet_listener pop3 {
}
inet_listener pop3s {
}
}
service submission-login {
inet_listener submission {
}
inet_listener submissions {
}
}
service lmtp {
unix_listener /var/spool/postfix/private/dovecot-lmtp {
group = postfix
mode = 0600
user = postfix
}
}
service imap {
}
service pop3 {
}
service submission {
}
service auth {
unix_listener auth-userdb {
}
unix_listener /var/spool/postfix/private/auth {
group = postfix
mode = 0660
user = postfix
}
}
service auth-worker {
}
service dict {
unix_listener dict {
}
}
ssl_server {
cert_file = /etc/dovecot/private/dovecot.pem
key_file = /etc/dovecot/private/dovecot.key
}
protocol lmtp {
postmaster_address = admin@gr4.lan
}

Re: Issue connecting Windows AD ↔ Dovecot via LDAPS

ByteWave

2.4.1-4 (7d8c0e5759): /etc/dovecot/dovecot.conf

Pigeonhole version 2.4.1-4 (0a86619f)

OS: Linux 6.12.63+deb13-amd64 x86_64 Debian 13.3 ext4

Hostname: deb13

4 default setting changes since version 2.4.0