Design 6: Email agent
Words made simple
A few useful meanings before you read the explanation.
- Agent
- An application that uses a model to choose its next action within defined limits. It can use tools and continue through several steps.
- Persistence
- Saving information so it remains available after a request ends or a process restarts.
- Authorization
- Checking what that identity is allowed to read or do. Being logged in does not grant access to every record.
Overview
A mailbox-aware assistant for triage, search, summaries, and reviewed outgoing messages. Sending is a controlled tool.
Why this matters
Repeated correspondence consumes staff time.
An everyday example
An assistant drafts replies for signature.
A technical example
Associate an incoming invoice email with an authorized claim and draft acknowledgement.
How it works
- Verify mailbox scope
- Parse
- Retrieve case context
- Draft
- Validate recipients/attachments
- Approve/send.
Architecture and flow
Mailbox event → scoped worker/agent → draft → review → sender → receipt.
The insurance assistant example
Request missing documents from the correct customer.
When to use it
Controlled triage/drafting with clear mailbox permissions.
When to avoid it
Unrestricted autonomous forwarding creates data-leak risk.
Interview answer
“I treat incoming email as untrusted and separate draft generation from approved, deduplicated sending.”
Benefits, trade-offs, and production considerations
Persist provider message IDs, thread IDs, draft hash, send key, and outcome. Reconcile ambiguous send results and prevent reply loops.
Can you explain it without the notes?
Design 6: Email agent
Use your own words. Explain an example and one limitation before checking the explanation.
Check your explanation
A mailbox-aware assistant for triage, search, summaries, and reviewed outgoing messages. Sending is a controlled tool.
Turn this concept into a clear answer.
Practice this conceptAdapted from 13_AI.MD · “Design 6: Email agent”. Examples are study fragments; framework behavior can depend on your version.