Outbound email is most reliable when applications can hand off bounded, auditable tasks instead of embedding transport details everywhere.

This work connects Mail-Mgmt to a broader agent-router pattern: public apps validate user intent, create a structured mail request, and register a specific mail-send task for worker infrastructure to complete through an approved delivery path.

The result is a cleaner boundary between application logic and operational delivery. Local development writes inspectable JSON messages to disk, while production can route through a worker host and Proton Bridge style SMTP path.

Key pieces:

• Structured mail-send task registration
• Local mock outbox for safe development
• Production worker handoff boundary
• Labels and task keys for traceability
• Room for approval gates before sensitive sends