On 2. Apr 2026, at 12.14, Klaus Tachtler via dovecot <dovecot@dovecot.org> wrote:

ssl_client_key_file = /etc/dovecot/ssl/private/wildcard.idmz.tachtler.net.key.pem

dovecot[9510]: auth: Error: mysql(db.idmz.tachtler.net): Connect failed to database (postfixadmin): File '/etc/dovecot/ssl/private/wildcard.idmz.tachtler.net.key.pem' not found (Errcode: -280287320) - waiting for 1 seconds before retry

5 times inside the log.

However, the file does exist:

ls -la /etc/dovecot/ssl/private/wildcard.idmz.tachtler.net.key.pem

-r-------- 1 dovecot dovecot 1703 Feb 27 09:55 /etc/dovecot/ssl/private/wildcard.idmz.tachtler.net.key.pem

I had already set the ownership to root:root, but the key file is still not found, even though it's definitely there.

By default auth process runs as default_internal_user = dovecot user. Maybe mariadb library gives "not found" error instead of the correct "permission denied" error. Try changing its owner to dovecot, or setting service auth { user=root }