Here's why:
* Respect: Capitalizing "you" shows respect for the professor as an individual and your position as a student.
* Professionalism: In academic settings, formality is expected.
* Clarity: Capitalizing "you" helps to avoid confusion, especially in longer emails.
Example:
* Incorrect: "i hope you are having a good day."
* Correct: "I hope you are having a good day."