These features require additional licensing. Submit a request and provide business purposes for your use.
Multi-Send
Google Article: Use multi-send for email marketing, newsletters, and announcements
You can use multi-send mode in Gmail to:
- Create email campaigns.
- Send newsletters and announcements.
- Personalize your email with mail merge.
When you add someone to the “To” field, multi-send emails each contact individually. Recipients won’t know who else you emailed. You'll also get replies in separate threads, making conversations easier to manage.
Please note that Gmail limitations apply.