1.  Go to Admin, Globally Add Records.
2.  Select Action as the record type to add.
3.  Mark Send email message?
4.  Click Action Information
5.  Select Email as the Category.
6.  Select the appropriate email type in the email drop-down menu.
7.  Click Save and Close to return to the Global Add screen.
8.  Click Enter email now to add the email message.
9.  Enter the email message.
10.  Click Send Now to send the email message.

Review How to email Constituents and How to Globally Add Actions for more information.