domainwidedelegation.comStart free

Use cases → Email operations

Enforce email keyword policies with delegated scanning

Scan sent mail for sensitive keywords and trigger actions when policy violations are found, using a delegated service account.

Who it is forIT and compliance teams charged with monitoring data exfiltration or sensitive content leaks.
APIsGmail API
Typical scopesgmail.readonly

The problem

Sensitive or regulated terms in outbound email are a common compliance risk. Relying on user training or manual spot checks misses violations, and native Gmail DLP is limited in flexibility and reporting.

How it works

  1. Delegate domain-wide authority to a service account with gmail.readonly scope.
  2. Periodically scan the 'Sent' mail of target users for policy keywords.
  3. Flag or log messages matching patterns for review and escalation.
  4. Optionally notify supervisors or compliance contacts on detection.

What changes

Outbound email is systematically scanned for policy breaches, and violations are surfaced for action without user involvement.

The trap in this one. Gmail API’s message list and message get endpoints can lag behind the actual send event, especially for high-volume accounts, so scanning too soon after sending will miss some messages. In practice, this leads to inconsistent detection windows and missed violations unless you build in a delay or backfill on each run.

Questions people ask

Does this pattern catch messages sent via SMTP or third-party clients?

It catches any message present in the user's 'Sent' label, which covers standard clients, but some SMTP relays or automated systems may bypass the label and evade detection.

Can this be used to block emails before they are sent?

No; with read-only access, you can only detect and report after the fact. Pre-send enforcement requires native Gmail DLP or a gateway.

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

Related use cases

Draft replies automatically in a shared inbox

A delegated service account reads an incoming enquiry, drafts a researched reply in the mailbox, and leaves it for a human to approve and send.

Triage and route inbound mail across a domain

Classify every inbound message, label it, and forward the ones that matter to the person who owns them — without touching a single mail rule.

Send mail as a shared alias from automation

Deliver notifications, confirmations and campaign replies from a branded address like support@ or updates@ without a human in the loop.