To dream of Christmas cards represents making an effort to show other people that you care about them. Making an effort to show other people that you love them. Reciprocating feelings of togetherness. Reminding people that you are thinking about them and hoping they are happy. Extra efforts made to care about other people’s feelings.
To dream of old Christmas card may reflect feelings about how close, special, or loving a relationship use to be. Remembering the effort that used to be put into showing people they were cared about in the past. Remembering better times with family. Feelings about current family life being more snobby than it used to be.
Example: A woman dreamed of people throwing old family Christmas cards in the garbage. In waking life she felt that her family was falling apart and purposely distancing themselves from each other due to a divorce in the family.