Hi, I got same problem!
# 2.3.21 (47349e2482): /etc/dovecot/dovecot.conf # Pigeonhole version 0.5.21 (f6cd4b8e) # OS: Linux 6.8.0-41-generic x86_64 Ubuntu 24.04.1 LTS auth_debug = yes auth_debug_passwords = yes auth_mechanisms = plain login auth_username_format = %Ln auth_verbose = yes auth_verbose_passwords = plain debug_log_path = /var/log/dovecot-debug.log info_log_path = /var/log/dovecot-info.log log_path = /var/log/dovecot.log mail_debug = yes mail_location = maildir:~/Maildir/ mbox_write_locks = fcntl namespace inbox { inbox = yes location = mailbox Drafts { special_use = \Drafts } mailbox Junk { special_use = \Junk } mailbox Sent { special_use = \Sent } mailbox "Sent Messages" { special_use = \Sent } mailbox Trash { special_use = \Trash } prefix = } passdb { driver = pam } protocols = imap pop3 lmtp service auth { unix_listener /var/spool/postfix/private/auth { group = mail mode = 0660 user = postfix } } service lmtp { unix_listener /var/spool/postfix/private/dovecot-lmtp { group = mail mode = 0660 user = postfix } } ssl_cert = </etc/letsencrypt/live/lja.fi/fullchain.pem ssl_key = # hidden, use -P to show it userdb { args = username_format=%Ln driver = passwd } protocol lmtp { postmaster_address = postmaster@localhost } protocol imap { imap_metadata = yes }