A blonde went out to her mail box and looked in, closed the door and went back in the house. A few minutes later she went out and looked in the mail box again. She did this several times and her neighbour who was watching her said "you must be expecting a very important letter today the way you keep looking into your mail box."
The blonde answered, "No, I am working on my computer and it keeps telling me that I have mail."
<Rimshot>
Of course, if you laugh, you only have yourself to blame.