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Use cases → Email operations

Monitor all mail for sensitive keywords across the domain

Scan incoming and outgoing email for keywords or phrases using a delegated service account, flagging or reporting policy violations in near real time.

Who it is forSecurity and compliance teams, or IT administrators in regulated industries.
APIsGmail API
Typical scopesgmail.readonly

The problem

Manual spot-checking of user mailboxes misses incidents and is not scalable. Compliance demands proactive detection, but Google Workspace provides no native way to scan all mail for arbitrary terms post-delivery.

How it works

  1. Grant domain-wide delegation to a service account with read-only Gmail scope.
  2. Impersonate each user and fetch recent messages using the Gmail API.
  3. Parse message bodies, subjects, and attachments for target keywords.
  4. Log hits or trigger alerts as required.
  5. Regularly poll for new messages to minimise detection lag.

What changes

Security and compliance teams get actionable alerts or audit logs whenever sensitive terms appear in email, without relying on user reporting.

The trap in this one. The Gmail API's historyId mechanism can silently skip messages if a mailbox is heavily updated between polling intervals. If your polling script falls behind or encounters a failure, messages may be missed entirely unless you re-index the entire mailbox—which is slow and burns quota. Always checkpoint the latest historyId, and test recovery from missed intervals to avoid silent data gaps.

Questions people ask

Can this monitor attachments as well as message text?

Yes, but you must explicitly fetch and decode attachments. This adds API calls and complexity, especially for larger files.

How quickly can new messages be detected?

Polling intervals and API quota limits set the pace. Near real time is possible with small domains, but large ones may require trade-offs between completeness and timeliness.

Want this built?

This is a pattern we run in production. We will set up the delegation and build this on top of it — $500 per hour, most of it working the same day.

Talk to us Or read the setup guide

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