No, it is not a sacrament because a sacrament must involve a specific structure. It is an analogy to the sacraments, which is why it’s called a sacramental. Just as we cannot administer a sacrament through the internet or at a distance, we cannot bless objects online. A sacramental must involve a physical presence because it is an official act of the Church.
Dear visitors of Gloria Dei and all who have already written or who will write a personal message to me. I am grateful for your attention, your kindness, for your spiritual support and especially for your sacrifices and prayers for me. God may reward you!