The term E-MAIL USER can be summarized as someone who sends emails. The crossword solution for this term is SENDER, which is a 6 letter word. An E-Mail User is someone who uses email to communicate with others. They are responsible for sending emails to other people, and may also receive emails from others. Email has become an important part of communication in the modern world, and E-Mail Users are essential for keeping in touch with friends, family, and colleagues.