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Use cases → Email operations

Send company-wide announcement blasts via delegated service account

Use a delegated service account to deliver high-impact announcement emails to all staff, with tracking and retries for delivery issues.

Who it is forIT or communications teams responsible for internal announcements across the organisation.
APIsGmail API
Typical scopesgmail.send, gmail.readonly

The problem

Critical company-wide communications need to reach every user reliably, with proof of delivery and the ability to handle bounces or missed recipients. Manual sending is error-prone and does not scale, especially with thousands of users.

How it works

  1. Prepare the recipient list from the directory and deduplicate addresses.
  2. Send messages using the Gmail API as each user, via domain-wide delegation.
  3. Record the Gmail message ID for each send to enable tracking.
  4. Query the sent mail and delivery status to identify bounces or undelivered messages.
  5. Retry failed sends with backoff and log all outcomes for audit.

What changes

All users receive the announcement from a consistent sender, with delivery records for compliance and reliable retry of failures.

The trap in this one. The Gmail API's send method is eventually consistent: messages may not immediately appear in Sent or be available for readback, especially under high load. If you check for delivery or bounces too soon, you get false negatives—leading to unnecessary retries or missed failures. Always delay status checks and use exponential backoff to avoid hammering the mailbox and missing late-arriving delivery receipts.

Watch it explained

“Your prayers have been answered! You can now send personalized mail merged Google Workspace emails” — tabGeeks: Pro Tech Meets Real Life on YouTube. Third-party video, included because it covers this ground well. We are not affiliated with the channel.

Questions people ask

Should I send as the user or a single central account?

Sending as a central account is simpler to audit, but may hit sending limits faster and can trigger spam filters. Delegated sending as each user is more resilient, but needs careful control to avoid impersonation issues.

How do I handle users who have left but still appear in the directory?

Check account status before sending. The API will throw an explicit error for suspended or deleted users, which you should log and skip.

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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