Well, I'm not a wine maker, mostly beer with a little mead and cider thrown in for good measure, but, I would say. Ignore the sulphur smell. That's just the yeast doing its thing. It will go away on its own with time.
Of all tyrannies, a tyranny sincerely exercised for the good of its victims may be the most oppressive. It would be better to live under robber barons than under omnipotent moral busybodies. The robber baron's cruelty may sometimes sleep, his cupidity may at some point be satiated; but those who torment us for our own good will torment us without end for they do so with the approval of their own conscience. - C. S. Lewis, English essayist & juvenile novelist (1898 - 1963)