Sejs said:So get your Prot from Evil going. Blocks mind control from non-good sources.
Olive said:
Does it? Or does it block mind-control from evil sources?
But it doesn't help again charm person, since it isn't direct control of your mind.
Caliban said:It blocks mental domination from any source; good, evil, or otherwise.
But it doesn't help again charm person, since it isn't direct control of your mind.
Hypersmurf said:
That's the sensible ruling based on the PHB text.
Unfortunately, the FAQ strikes again :
The second function of the protection from evil spell
blocks any attempt to possess the warded creature or to
exercise mental control over the creature. What, exactly,
counts as mental control?
“Mental control” includes all spells of the school of
Enchantment that have the Charm subschool, such as animal
friendship, charm person, and charm monster. It also includes
some Enchantment spells of the Compulsion subschool if those
spells grant the caster ongoing control over the subject; such
spells include dominate person and dominate monster.
Compulsions that merely dictate the subject’s action at the time
the spell takes effect are not blocked. Such spells include
command, hold person, geas/quest, hypnotism, insanity, Otto’s
irresistible dance, random action, suggestion, and zone of
truth.
Would a protection from evil spell block mind-affecting
spells that aren’t from the Enchantment school, such as
cause fear, create undead, gate, hypnotic pattern, mount,
rainbow pattern, sanctuary, and summon monster?
No, see previous question.
I think that particular FAQ entry is a load of rubbish, but if your DM treats the FAQ as overriding of PHB text, then it's official...
-Hyp.
Olive said:
Really? so any prot from spell blocks any mental domination? So it would block dominate person? Without a save or opposed caster checks or anything?
So what IS (ignoring the FAQ) mental domination? Presumably and dominate spell. What else?
Though it does seem strange that it will stop Dominate Person but not Suggestion.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.