From what little I know, the End answer would be Arvandor. According to the FRCS, when 'mortals' die, the soul goes to the Fugue plane to await the call of their patron deity who swoops in (via agency) and escorts them to the patron's home plane.
I dont know if this is upposed to be true for just humans or all mortals. Sehanine Moonbow has the elven death portfolio.