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Use cases → Admin and governance

Roll out and maintain Gmail signatures across the company

Enforce consistent Gmail signatures for all users by applying updates through domain-wide delegation, avoiding manual setup and drift.

Who it is forIT administrators responsible for branding and compliance.
APIsGmail API, Admin SDK
Typical scopesgmail.settings.basic, admin.directory.user.readonly

The problem

Signatures are set up manually and users often ignore instructions, leading to inconsistent branding and missing legal text. Manual audits are slow and incomplete.

How it works

  1. List all active users with the Admin SDK.
  2. Fetch each user’s current signature using the Gmail API.
  3. Apply the standardised signature template via the Gmail API, impersonating each user.
  4. Repeat on a schedule or when branding changes.

What changes

All users have compliant, up-to-date signatures with zero manual effort, and changes can be pushed instantly when required.

The trap in this one. Setting the signature via the Gmail API is asynchronous: if you overwrite signatures in rapid succession (e.g. during bulk updates), a queued update can silently revert the intended signature. Insert a delay between updates to the same account, and always re-fetch to confirm the change stuck.

Questions people ask

Can users override the signature after rollout?

Yes, unless you re-apply regularly, users can edit their own signature. Schedule periodic enforcement to maintain consistency.

Does this update signatures on mobile clients?

It updates the web and official Gmail app signatures, but not third-party mail clients. Test client-specific behaviour before rollout.

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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