"Postcards" by James Blunt is a heartfelt love song that tells the story of a couple spending lazy Sundays together. The singer describes sitting on their back porch, strumming a guitar and entertaining their partner with exaggerated stories. They express their deep feelings for their loved one, comparing the relationship to being carefree children in a schoolyard. The lyrics convey a sense of nostalgia and longing for the moments they share, such as riding a bicycle and sitting on a rocking chair. Despite the joy they experience, the singer acknowledges the inevitable arrival of Monday, which means they can't be together. They want the recipient of the song to understand that they are always on their mind. Through the metaphor of sending postcards, the singer aims to openly express their love. They don't care if others see or know about their feelings, wanting the whole world to know what's in their head. The song emphasizes the difficulty of verbally expressing deep emotions, pointing out that writing them down can be a cathartic way to communicate. Overall, "Postcards" is a tender declaration of love, capturing the simple pleasures of a relationship and the desire to share these sentiments openly and without reservation.