Mail

A blonde goes out of her house and checks her mailbox. Seeing nothing, she closes the mailbox and goes back into her house.

A little while later, she comes back out of her house and once again checks for mail, sees nothing, closes the mailbox and goes back in her house.

Another little while later, she comes back out and does it again.

Her neighbor had noticed this and asked her.....Honey...you must be waiting for a very important letter.

The blondes replies......No, I'm working on my computer and it keeps beeping at me, saying "You've Got Mail."