This dream reveals a desire to receive something that is able to change our current situation. If the envelope contains something unpleasant or empty, it indicates fear. If we write a letter, and it is hard for us to do so, it also reflects fear. Breaking or burning the letter symbolizes break up with a friend or a relative. To receive an anonymous letter, it means there is something that disturbs our conscience. If it is unreadable, it shows disagreement or missed appointments.
Read more about dreaming of Letter, mail in other dream meanings interpretations.