The Names of Sauron

[Ren the Unclean]

Originally Posted by doug*platypus

the Mouth and the emissary... they enlarge their own importance and station by the use of the name Sauron, whereas it is debatable whether they could get away with that to Sauron himself. Most likely they would need to refer to him as "my lord" or similar.

I find this explanation very satisfying.

I also liked the post which suggested that the prohibition against using Sauron's name applied only when he was concealing himself in Dol Guldur.