Of Communication with Excommunicated Persons

We must now consider communication with those who are excommunicated. Under this head there are three points of inquiry:(1) Whether it is lawful to communicate in matters purely corporal with one who is excommunicated?(2) Whether one who communicates with an excommunicated person is excommunicated?(3) Whether it is always a mortal sin to communicate with an excommunicated person in matters not permitted by law?

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