Backlog — not scheduled. The email envelope base64s an already-base64-wrapped payload (documented significant size overhead in the handover), and detection rests on attachment filename conventions. Envelope format 2: a self-describing application/postguard part with a format parameter, detection by content type rather than filename, single encoding pass. Same rollout rule as format 3: readers first.
Part of #247 (workstream G).
Backlog — not scheduled. The email envelope base64s an already-base64-wrapped payload (documented significant size overhead in the handover), and detection rests on attachment filename conventions. Envelope format 2: a self-describing application/postguard part with a format parameter, detection by content type rather than filename, single encoding pass. Same rollout rule as format 3: readers first.
Part of #247 (workstream G).