You can compose an email and schedule email delivery for a future date. The email message that is delayed is saved to your Draft folder. Once the specified date and time is reached, the email is sent and a copy of the email is moved to the Sent folder.
Click the Send arrow in the toolbar and select Send Later...
In the Specify Message Sent Time, enter the date and time to send the message. Click OK.
The message is saved to your Draft folder. When you open the message, the scheduled send time is shown in the header.
To change the time or cancel the future delivery, click Edit.