Whether it is lawful, in matters purely corporal, to communicate with an excommunicated person?

❌ Objection 1 : It would seem that it is lawful, in matters purely corporal, to communicate with an excommunicated person. For excommunication is an act of the keys. But the power of the keys extends only to spiritual matters. Therefore excommunication does not prevent one from communicating with another in matters corporal.

❌ Objection 2 : Further, "What is instituted for the sake of charity, does not militate against charity" (Cf. Question [11], Article [1], Objection [1]). But we are bound by the precept of charity to succor our enemies, which is impossible without some sort of communication. Therefore it is lawful to communicate with an excommunicated person in corporal matters.