Call back mail from gmail

You're referring to the "Call Back" feature in Gmail!

The "Call Back" feature in Gmail allows you to schedule a callback from a Google Voice number. Here's how it works:

  1. Compose a new email or reply to an existing one.
  2. Click on the "More" menu and select "Call Back".
  3. Choose a Google Voice number to use for the callback.
  4. Select a time and date for the callback.
  5. Click "Schedule" to schedule the callback.

Once you've scheduled the callback, the recipient will receive a notification with a link to schedule a call at the time you specified. They can then click on the link to schedule the call.

Here are some benefits of using the "Call Back" feature in Gmail:

Note that the "Call Back" feature is only available for Gmail users who have a Google Voice account and are using the Gmail app on their desktop or mobile device.