I’d like to introduce useful links to Google Apps official help regarding email and group message sending limits in G Suite (formerly Google Apps).

• メール送信に関する制限事項 - G Suite 管理者 ヘルプ
• Google グループのポリシーと制限 - G Suite 管理者 ヘルプ

Occasionally, DAEMON emails like the one below arrive, making mailing lists (group emails) unusable.

In such cases, it might be good to avoid adding domains other than the one used in G Suite (for example, @gmail.com) to groups as much as possible.

Title: Delivery Status Notification (Failure)

To: me@example.com

Delivery to the following recipient failed permanently:

 group@example.com

Technical details of permanent failure: The domain example.com has exceeded its quota for the maximum number of external recipients.

----- Original message -----

That’s all from the Gemba.