𝗢𝗯𝘀𝗲𝗿𝘃𝗮𝗯𝗶𝗹𝗶𝘁𝘆 𝗳𝗼𝗿 𝗘𝗺𝗮𝗶𝗹 𝗔𝗴𝗲𝗻𝘁𝘀
You cannot watch an email agent work in real time.
But you can see everything it did yesterday with one API call.
Building agents on email gives you built-in observability. Most autonomous systems require extra tools for tracing and logs. An email agent gets these for free because the mailbox is the record.
Here is how you use email to monitor your agents:
Input Monitoring Every inbound message triggers a message.created event. This provides the thread ID you need to rebuild the conversation. If a message is too large, look for the message.created.truncated trigger. This tells you to fetch the full body via ID.
Output Monitoring The platform reports on every send. Track these three triggers to see your delivery health: • message.send_success: The recipient server accepted the mail. • message.send_failed: A rule or policy blocked the outbound mail. • message.bounce_detected: The remote server rejected the mail.
A rise in send_failed counts is your first sign of a problem. It means a rule or a quota is throttling your agent.
State Monitoring Mailbox folders act as a state machine. • Junk folder: Shows you what your spam filters are catching. • Drafts folder: Serves as an approval queue for human-in-the-loop designs. If a draft sits there too long, your approval process is stalled. • Sent folder: Provides a perfect audit log. The log cannot disagree with reality because the email is the reality.
Governance Monitoring If an agent misses a message, check the rule evaluations. You can query why a rule rejected a message at the SMTP layer. This replaces guessing with data.
One limit to remember: You can track delivery, but you cannot track if a human opened or clicked a link through this API. You also need to log your own reasoning. The mailbox shows what the agent did, but you must log why the agent decided to do it.
Start by tracking these three:
- message.send_success
- message.send_failed
- message.bounce_detected
Input failures are loud and obvious. Output failures are quiet. Tracking these signals helps you find errors in minutes instead of weeks.
Source: https://dev.to/qasim157/observability-for-email-agents-4egn
Optional learning community: https://t.me/GyaanSetuAi