"Do you write a lot of emails?"
Translation:¿Escribes muchos correos electrónicos?
One tip: Emails in Spanish can be translated as "emails" or "correos electrónicos". "Emails" is used in everyday language, and it is a lot less laborious to write "emails" instead of two long words. After all, in English we could say "electronic mail" and it would still have the same meaning, but it is MUCH more common just to say "email".