According to Ken Schramm (The Compleat Meadmaker, pg41, 42) even heating your honey to 80Deg C may be a bit too high (or at least excessive):
"Dr Jonathan White of the United States Department of Agriculture (retired) did a tremendous amount of research on honey and concluded that the amount of heat exposure needed to kill off the wild yeast in honey is as little as five minutes at 150F (66C), or about 22 minutes at 140F (60C). I Recommend the lower and slower approach. The aromatic compounds in honey become more volatile at higher temperatures."
Even more interesting is that he goes on to comment that he does not even heat or treat his honey now:
"I have not heated or boiled my must for several years now ... In all that time, I have not produced one batch I would categorize as infected or otherwise adversely affected"