Composer attachment limits follow the sending provider

Shipped

November 13, 2026 at 8:14 AM UTC

Author

Kamo

Commit

5afd182

useProviderCapabilities(from) asks GET /api/email/provider?from= for the provider that sends as the chosen From address and its maxAttachmentBytes / maxMessageBytes (plus driveSource / driveConnected for later phases). The message composer's attachment policy and pre-send size check now use those numbers, falling back to the fixed 25 / 40 / 50 MB only when the server sends none. A provider can lower the endpoint's request ceiling, never raise it. DL0.2, DL0.5