After I attempted to send a e-mail to an address with a bad extension, I logically got the message "unable to send e-mail. However the message will not go away. I can send e-mail, no problem. I have rebooted, Put in my mail settings over again, but to no avail. Even though my e-mail is working fine ...the message "unable to send e-mail" keeps popping up. Anyone know a solution?