Yes you may send a letter from Canada
https://www.inmateaid.com/ask-the-inmate/i-want-to-speak-to-an-inmate-i-do-not-know-i-would-like-to-ask-them-a-question-should-i-send-them-a-letter-can-i-send-a-letter-from-canada#answer
Accepted Answer Date Created: December 07,2023