Create a filter for every email address he has, or any email that comes through with his name. As he slowly uses more of his family’s and friend’s email addresses to contact you (which he will), filter those, too. Don’t just “archive” the emails. Or send them to spam. Because you will be tempted at some point to look up those messages. And the content could shake you to your core. That is why this filter is being created; because even though you know he is crazy, you loved him at one point, and his words have the power to hurt you. Even to tempt you to call him up…create a filter that automatically deletes the emails. Poof!