Source: The Great Interpretation of Dreams (Ibn Sirin)
A message in a dream indicates a position of power or rank. A folded message indicates a hidden matter. Reading it indicates hearing news. If it is sealed, it is true news.
Source: Perfuming Humanity in the Expression of Dreams (Al-Nabulsi)
A message indicates the fulfillment of needs. Whoever sees himself writing a message is striving for a matter and will attain it.
Source: Signs in the Science of Expressions (Ibn Shaheen)
A message is interpreted as news. If it is open, it is well-known news. If it is closed, it is secret news.