Ajay is a teacher, Lee is his student

This is an email that Ajay has written to Lee's mother, Viv.

Dear Viv I am writing with some concerns about Lee. I understand that you are moving away. I wonder whether you have thought about the impact on Lee? He is going through a really hard time at the moment. As we know, the principal has it out for him and I don't want him to get into trouble. Regards Ajay

What is the communication register of this email?

What are the spoken and unspoken messages in this?

What are the strengths and weaknesses of this communication?