Sending a message to the wrong person is read as fear of exposure and of a private feeling slipping out. Dream books also see it as a truth that wants to reach someone.
When this appeared in your dream, what were you feeling?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.