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Use cases → Admin and governance

Enforce email retention across the entire organisation

Implement and audit a uniform retention policy for all email accounts using a delegated service account and the Gmail API.

Who it is forIT administrators responsible for compliance and data governance.
APIsGmail API, Admin SDK
Typical scopesgmail.modify, admin.directory.user.readonly

The problem

Legal and regulatory requirements often mandate that emails are retained or deleted after specific periods. Manual enforcement is impractical at scale, and inconsistent retention exposes the organisation to risk.

How it works

  1. Enumerate all active users with the Admin SDK.
  2. For each user, use domain-wide delegation to impersonate their account.
  3. Search for messages matching the retention criteria using the Gmail API.
  4. Apply labels or delete messages to enforce the policy, tracking actions for audit.
  5. Report on users where enforcement failed or was incomplete.

What changes

Retention policy is applied uniformly, with an audit trail of actions taken per user, reducing compliance risk.

The trap in this one. The Gmail API’s batchDelete operation is subject to per-user and per-day quota, but these limits are not surfaced until mid-run. If you hit quota partway through processing, users processed after the limit will be silently skipped or fail with transient errors, leaving gaps in enforcement. There is no built-in resume or checkpointing, so partial runs can leave the organisation out of compliance without alerting you.

Watch it explained

“Deep dive into Google Workspace security: How to make safe and smart collaboration a reality” — Google Workspace on YouTube. Third-party video, included because it covers this ground well. We are not affiliated with the channel.

Questions people ask

Can retention be enforced retroactively on existing mailboxes?

Yes, but expect the first run to process a large volume. This is where you are most likely to hit API quotas or timeouts.

How do I prove that the policy is enforced?

Log every action taken, including message IDs and timestamps, and store failed actions for review. Auditors will expect this detail.

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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