Here’s how to send emails from Zendesk using G Suite group custom domain email addresses.

Prerequisites

• Custom domain DNS is managed by Amazon Route 53
• Set up groups created in G Suite as the email address for sending emails from Zendesk

How to configure Zendesk and G Suite

Basically, the configuration was completed by following the two articles from the Zendesk official help pages below:

自社のメールドメインの代わりにZendeskからメールを送信する方法 – Zendeskヘルプ

Googleグループをサポートアドレスとして使用する – Zendeskヘルプ

For writing SPF records, I referred to the following site:

間違いから学ぶSPFレコードの正しい書き方 : 迷惑メール対策委員会

That’s all from the Gemba.