The sulphur smell can be a lack of nutrients for your yeast, I usually add some yeast nutrient to all my ciders. You may be able to add some now, one week is only half way through your primary probably, if you have none on hand, I think you can boil some bread yeast and add some of it to your brew and I know raisins boiled and broken down can be used as a nutrient, but you may want to wait to hear from one of the cider pros, I've only been making cider for a few months now.
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