Before going on Vacation, you can change your e-mail settings to automatically respond. Here's how to do it.

Navigate to your Gmail Inbox https://www.google.com/gmail/about/

Type "Out of Office - September 15 - 17, 2021"

If you need immediate assistance please reach out to my colleague.

Click the "Only send a response to people in my Contacts" field.

Click the "Only send a response to people in Scribe" field.

How to turn on automatic replies in Gmail