Quick help: "Messages" -> "compose" -> "send later" -> set date / time -> "schedule" 

Click "Messages" in the menu on the left followed by the blue "compose" button in the upper right. 

Check the "send later" box and fill in the date and time. 

Select recipient under "send message to".

Click the orange “schedule” button and confirm in the popup window.

You can find your mail under "Messages" -> "scheduled" where you can see the date/time the email will send.


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