keitai email etiquette

Students often use their keitais to send email to me. This is fine, but there are some things you have to remember. The first is that you have to put your name. If I get a message from i_love_puffy_1979@ezweb.co.jp, that doesn't tell me who sent me the message. The second thing is to make sure you add a subject to the email. It only needs to be one or two words, but if it doesn't have a subject, I can't tell what it is about.

I'm checking my email a lot during the day and often late at night, so email is the best way to ask a quick question. Simple English is always best. Good luck