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Use cases → Admin and governance

Centralised management of email allow and block lists

Update domain-wide email whitelists and blacklists from automation, keeping threat controls and exceptions current across all users.

Who it is forSecurity and IT teams responsible for mail hygiene and compliance.
APIsAdmin SDK
Typical scopesadmin.directory.domain, admin.directory.user.security

The problem

Manual updates to allow/block lists mean inconsistent policy and slow response to new threats or business requirements. Delegated automation lets you batch or schedule changes centrally, but the update path is not obvious and not every change applies instantly.

How it works

  1. Use a delegated service account with admin.directory.domain and user.security scopes.
  2. Fetch the current global and user-level allow/block lists via the Admin SDK.
  3. Apply additions or removals to the correct domain or user settings as needed.
  4. Confirm the update via a second read to verify the new state.
  5. Log all changes for audit and potential rollback.

What changes

Email controls update faster and more reliably, reducing the window of exposure and ensuring all users inherit the same baseline policy.

The trap in this one. There is a propagation delay of up to several minutes before changes made via the Admin SDK take effect in the live Gmail environment. During this window, messages may be allowed or blocked based on the prior state, which can lead to race conditions in incident response or testing. Additionally, batch updates to user-level settings can silently skip users with non-standard mailbox configurations, so always verify post-update state for every target.

Questions people ask

Does this pattern support per-user exceptions?

Yes, but only if you update user-level settings specifically. Domain-level lists override, so be careful to match the right update to the intended scope.

How quickly do changes apply to inbound mail?

In practice, allow/block list updates can take several minutes to propagate. Critical changes should be checked via test messages before assuming they are live.

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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