"Key's In The Mailbox" is a country song recorded by Ernest Tubb in 1968. The lyrics depict a story of a person who has been left alone by their lover, feeling jealous and hurt. The protagonist realizes the mistake they made in pushing their lover away and regrets the lonely nights they've spent. Despite their initial resistance, they still long for their lover's return. The key in the mailbox symbolizes an open invitation for their lover to come back into their life. It signifies their willingness to forgive and reconcile, as they sit alone, yearning for their lover's love once again. The protagonist acknowledges that they would rather be with their lover, even if it means sharing them or not knowing where they've been. They are willing to accept the lover on any terms, just to have their presence back. Overall, the song expresses the deep longing and regret of a person who realizes the importance of their lover and is willing to put aside their pride and previous disagreements to have them back in their life.