fix(domains): relay_account_enabled and metered toggles were nested inside the imap_auth_enabled conditional — Form.Items were unmounted when IMAP was disabled, causing AntD to omit them from onFinish values and reset them to false on every save (1.50.57)
fix(dovecot): add auth_username_format = %{user} to prevent Dovecot from lowercasing relay account usernames — mixed-case tokens were normalized to lowercase and failed lookup in sasl_accounts, causing 535 authentication failures (1.50.57)
fix(upgrade): add --force-confnew to nmg-self-upgrade — dpkg conffile prompt was blocking unattended upgrades when managed config files were modified (1.50.57)