In emails, I use "yours faithfully", "your sincerely", "regards" or "kind regards" depending on the context. I also use "cheers", which I use as a multi-purpose word in spoken coversation anyway. However, at the start of an email, I tend just to use the person's name (surname if we're not acquainted, forename if we are) or "Dear Sir or Madam" if it's to "complaints@????.com" or "service@????.com" (as many of my emails are).
Now I come to look at it, Christine seems such a silly name. It's like the brand name of a sort of mini-Messiah individually wrapped for your comfort and convenience.