What about using a double-boiler method? Then its much easier to control the temp, the honey on the bottom cant get 'burnt', and the maximum temp would be 100 C. I have used this method a bit... the honey seems to be just fine afterwards...
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Another reason not to boil honey when making mead: Honey which comes from local bees carries pollen and pathogens relevant to your area. Consuming these natural medicines will boost your resistance to local pollens and other allergens. Boiling destroys them.
If all else fails, just drink more mead anyway...