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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: email@localhost?

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: email@localhost?

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?

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: email@localhost?