If a woman has a male slave, is he considered a mahram (a relative one may not marry) to her?

The questioner : If a woman has a male slave who is not one of the men who are prohibited to her, is it permissible for her to verify [her status]?

The Shaykh : A slave is not a mahram, because we stated that a mahram is one who is permanently prohibited to her, and a slave is not permanently prohibited to his wife.

The questioner : But he is not, I mean, everything.

The Shaykh : Even if he is not a mahram, the prohibition must be permanent, yes.