Key 's in the Mailbox spawned four singles between 1991 and 1992 , none of which charted on the Billboard Magazine Hot Country Singles & Tracks chart or the Canadian RPM Country Tracks chart .
It would be Mandrell 's final release to chart on any Billboard album list .
Key 's in the Mailbox spawned four singles between 1991 and 1992 , none of which charted on the Billboard   Hot Country Singles & Tracks chart or the Canadian RPM Country Tracks chart .
It would be Mandrell 's final release to chart on any Billboard album list .