Sometimes, when I log into a box and 'su' to root, I get a cute little message saying I have mail (thank GOD it's not AOL).
- Where is this mail?
- What does it contain?
- Who/What sent it?
- How important is it?
Is this even actual "mail" in the same sense as email? Or is it just my system telling me something?
EDIT: In relation to this question, would I be able to send myself mail using the sendmail program like so: