Likely, email is a combination of all of the above. However, the frustration doesn't end there, when professionalism and even common sense seem to have flown out the window.
Jennifer Schultens, an associate professor of mathematics at the University of California, Davis, received this e-mail message last September from a student in her calculus course: "Should I buy a binder or a subject notebook? Since I'm a freshman, I'm not sure how to shop for school supplies. Would you let me know your recommendations? Thank you!"
Link. As email makes professors more accessible to students, some err on the side of too casual and do not demonstrate the proper respect that would be otherwise displayed with a face-to-face meeting.
What's the answer? I don't know, but don't follow this example.
Indexed by tags email, professors, college, professionalism.