1.5.3 (2026-04-28)

New: Help shape Bulwark Webmail. Each instance now sends a lightweight daily heartbeat (version, platform, bucketed account counts, feature toggles - never message data or PII) so we can see which platforms and features actually get used and prioritize fixes where they matter most. You're in control: opt out any time from Admin → Telemetry or by setting BULWARK_TELEMETRY=off. Full schema in the privacy notice.

Features

• Telemetry: Anonymous instance telemetry, on by default. Reports schema version, platform, bucketed account counts, and feature toggles only - disable from the admin UI, with BULWARK_TELEMETRY=off, or by clearing the endpoint
• Telemetry: Track unique logins (HMAC'd per instance, 90-day retention) so the heartbeat can report bucketed account totals without storing usernames
• Plugins: Theme API v2 with token compiler and skin slot
• Plugins: Extension preview page and detailed extension info API
• Calendar: Right-click context menu on empty calendar space
• Docker: Persistent named volume for telemetry data so the instance id and admin's consent choice survive container upgrades

Fixes

• Security: Block telemetry endpoint from pointing at internal/loopback hosts (validation + DNS-rebind re-check at fetch time)
• Security: Harden plugin config, TOTP token exchange, and branding file serving
• Mail: Batch shortcuts now act on the multi-selection when one is present (#228)

1.5.2 (2026-04-27)

Features

• Plugins: New composer-sidebar slot and ui:composer-sidebar permission — plugins can now render a panel on either side of the New Message dialog. See repos/subway-surfers for an example
• Plugins: Manifests can declare frameOrigins — a strictly-validated list of https://host origins the plugin needs to embed. The proxy reads the union from enabled plugins and merges it into the host CSP frame-src, so the host CSP no longer needs to know about specific embed providers
• Calendar/Contacts: JMAP sharing for calendars and address books
• i18n: Czech language support

Fixes

• Security: Validate URLs before outbound fetch
• Calendar: Prevent drag creation on touch events in the time grid
• Contacts: Emit RFC 9553 name kinds and decode QUOTED-PRINTABLE in vCard import (#224, #187)
• Mail: Hide preview line in compact density to match settings preview (#223)
• Proxy: Inline matcher for Next.js proxy and drop unnecessary Node.js runtime config
• i18n: Portuguese fixes for "ficheiro" and "contactos" variants