v1.7.6 - Crypto Plugin API & Privileged Plugin Tier, S/MIME as a Plugin, Hide Folder Counts & Structured MFA Login

1.7.6 (2026-06-28)

Breaking Changes

• S/MIME: The built-in S/MIME implementation has been removed from core and re-delivered through the new generic crypto plugin hooks (privileged same-origin plugin tier). S/MIME signing, encryption, decryption, certificate management, and the related settings UI now live in a plugin rather than the main app. Deployments that relied on built-in S/MIME must install the S/MIME crypto plugin to retain those features.

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Features

• Plugins: Privileged same-origin plugin tier with a crypto API surface
• Plugins: Plugin hooks for email details, headers, and source
• Mail: Option to hide the total message count on folders (#498)

Fixes

• Mail: Hide the server scheduled folder when the virtual one is shown (#495)
• Mail: Stop the unified mailbox from mutating client-returned email objects
• Composer: HTML-escape sender and subject in the reply/forward quote header (#482)
• Calendar: Send calendar invites by setting organizerCalendarAddress
• Identity: Sync the default identity (preferredPrimaryId) to server settings (#507)
• Auth: Support MFA login via the structured auth endpoint
• Admin: Show all built-in themes in the admin theme controls (#496)
• i18n: Add missing translation keys across 19 locales