Are you talking about emailing students using your school's email system, or are you talking about messaging students using the Canvas Inbox?
Canvas does not have have an email functionality (editor); however, through Canvas Notifications certain information (Notices) can be sent to a user's email account of choice.
To use the Canvas Inbox (too often mistaken for an email editor) you can learn more at: https://community.canvaslms.com/docs/DOC-10074-4152719677
I hope this helps,
Hi @mstrine ~ It's been a few weeks since you initially posted your question, and I wanted to take the opportunity to revisit it. How are things going? Were you able to successfully reach your students? Were the links that @SkyVKing and @kmeeusen helpful? Let the Canvas Community know if you have any further questions.
Hello @mstrine ...
As I was looking through older posts here in the Canvas Community, I noticed that we have not heard from you since you first posted this question on August 17, 2017. As @klundstrum has asked, have you had a chance to review the feedback that you've received from @SkyVKing and @kmeeusen ? They have both given you great advice here. Since we've not heard from you for quite some time, I am going to mark your question as "Assumed Answered", but this won't prevent you or others from posting additional questions or comments below. I hope that this is okay with you, Mary. Looking forward to hearing back from you soon.