Turn on your vacation reply
On your computer, open Gmail.
In the top right, click the gear wheel for Settings, then click See all settings at the top of the panel.
Scroll down to the "Vacation responder" section.
Select Vacation responder on.
Fill in the date range, subject, and message.
Under your message, check the box if you only want your contacts to see your vacation reply.
At the bottom of the page, click Save Changes.
Note: If you have a Gmail signature, it will be shown at the bottom of your vacation response.
Turn off your vacation reply
When your vacation reply is on, you'll see a banner across the top of your inbox that shows the subject of your vacation response.
To turn off your vacation response, click End now.