Thanks for your support Aki :-)

Here is the output:

2.3.21 (47349e2482): /etc/dovecot/dovecot.conf

Pigeonhole version 0.5.21 (f6cd4b8e)

OS: Linux 6.14.0-1013-azure x86_64 Ubuntu 24.04.3 LTS nfs4

Hostname: *********

auth_mechanisms = plain login mail_gid = **** mail_location = maildir:/var/mail/%d/%n/Maildir mail_plugins = " imapc" mail_privileged_group = mail mail_uid = **** namespace inbox { inbox = yes location = mailbox Archive { auto = subscribe special_use = \Archive } mailbox Drafts { auto = subscribe special_use = \Drafts } mailbox Junk { auto = subscribe special_use = \Junk } mailbox Sent { auto = subscribe special_use = \Sent } mailbox Trash { auto = subscribe special_use = \Trash } prefix = } passdb { args = scheme=SHA512-CRYPT username_format=%u /etc/dovecot/passwd driver = passwd-file } passdb { args = proxy=y host=%{extract:host} port=%{extract:port} ssl=%{extract:ssl} pass=#hidden_use-P_to_show#:pass} username=%{extract:user} driver = static } protocols = imap pop3 lmtp service auth { unix_listener /var/spool/postfix/private/auth { group = postfix mode = 0660 user = postfix } } service imap-login { inet_listener imap { port = 143 } inet_listener imaps { port = 993 ssl = yes } } service lmtp { unix_listener /var/spool/postfix/private/dovecot-lmtp { group = postfix mode = 0600 user = postfix } } ssl_cert = </etc/letsencrypt/live/*****/fullchain.pem ssl_client_ca_dir = /etc/ssl/certs ssl_dh = ssl_key = userdb { args = username_format=%u /etc/dovecot/passwd driver = passwd-file } userdb { args = uid=**** gid=**** home=/dev/null mail_attribute=imapc:host=%{extract:host}:port=%{extract:port}:ssl=%{extract:ssl}:user=%{extract:user}:pass=#hidden_use-P_to_show#:pass} driver = static } protocol imapc { mail_plugins = " imapc imapc" }