It was once considered the symbol of a serpent that would descend in dreams to communicate a message, but the most common interpretation is that there is a connection between various levels of consciousness.
Dream dictionary: my aap message show me reply from message to all o dream meanings
To receive the post means that you are waiting for some news that might cause you either joy or fear depending on the message.
Seeing zodiac signs in a dream represents various aspects of your being and also how you connect with the universe. On the other hand, it can represent the passage of time and the qualities associated with each message.
To hear a song in a dream, denotes the longing of something or joy the one has, depending on the style of the music, as for example the slow songs would indicate the tranquility or longing the one is experiencing, but the bouncy and happy music brings happy emotions and experiences the one has. The dreamer should also pay attention to the lyrics of the song, as it could hide a very important message and meaning.