If I use divine Smite on a Rakshasa who has limited spell immunity, does he take any damage?

Hey, kind of a newbie question from me – If I use divine Smite on a Rakshasa who has limited spell immunity, does he take any damage? Divine Smite is no Spell so my guess would be on Yes, but I rather ask an expert.don't believe it would be immune, since spell is affecting your weapon, not targeting rakshasa

— Mike Mearls (@mikemearls) April 20, 2018

Thanks for the Answer, but isn’t Divine Smite a Class Feature and therefore no spell? It can be used during Barbarian Rage so I would assume it doesn’t count as a spell at all, no matter what or who it affects. yes, that's correct. was thinking of various smite spells.

— Mike Mearls (@mikemearls) April 20, 2018