The speaker is anxiously waiting for news from a girlfriend who is far away. At first, the request to the postman sounds hopeful: perhaps there is a letter saying she will come home. As the song continues, the long silence becomes painful, and the speaker admits that seeing the postman pass by without stopping has brought tears. The repeated pleas make the waiting feel urgent and almost desperate.
The “letter in your bag” stands for more than a piece of mail: it could bring reassurance, contact, or news of a reunion. “She’s returning home to me” shows what the speaker hopes the message will say, though the lyrics do not confirm that she is actually coming back. The phrase “you passed me by” is both literal—the postman has not delivered a letter—and emotionally suggestive, as if the speaker feels overlooked.
The song can be heard as a simple, direct expression of loneliness and longing, not as a detailed story about why the couple is apart. The speaker’s repeated appeal to the postman may be playful in its rhythm, but the tears and extended silence give the hope a sad edge. We do not learn whether a letter ever arrives, so the ending leaves the speaker still waiting.