Ruling on a woman answering the phone or someone knocking on the door?

Question:
If one of the friends knocks on the house door and I am not present, and only my wife is there, should she remain silent or answer and tell him that I am not present?

Answer:
If someone knocks on the door and only the wife is inside, or if the phone rings, there is no harm in answering the phone, and there is no harm in answering the door. The women in the time of the Prophet (peace and blessings be upon him) used to answer and speak, and they would welcome guests, with safety and keeping away from evil. So if she answers, she says: "He is not present." And if he asks and says: "Where is he?" and there is no harm in informing him, she says: "He is in such-and-such a place," if there is no harm in it, there is no harm in this.
Or if the phone rings and she picks up the receiver and knows who is calling and speaks to him about what he wants, and says: "The owner of the house is not present." And if he is present, she informs him so that he can speak to him. And if he is in a known place, she directs him to it, if he is pleased with that, and other such matters in which there is no blame.
The women in the time of the Prophet (peace and blessings be upon him), and likewise after him, did not feel shy about this matter, and there is no harm in it. The only harm is what leads to fitnah (trial, discord or temptation) or seclusion, or what results in submission—submission of speech—so that he may desire her, as Allah the Exalted said: [Al-Ahzab: 32].