Most email programs will allow a return receipt, unfortunately AOL only allows you to check addresses within AOL. You would have to set up another account with a different ISP and, like Olly said, it depends on the software that they are using as well.
Rambo- angelicon beagle mix waiting at the bridge 12/85-1/2000
Roxanne- queenicon beautiful brindle born 12-99
George - kingicon flashy brindle born 8-30-01