Fraction f_S of S that directly reaches the planetary surface, normalized to the solar composition, for two different sublimation temperatures, T_sub = 720 K (purple, chemical equilibrium case) and T_sub = 1000 K (orange). The accreted material is assumed to be of solar composition (solid line) or depleted in S by a factor of 1/3 compared to solar composition (dashed line). We assume that the planet stops accreting S once it reaches the sublimation temperature of FeS at the bottom of the envelope. The gray horizontal bars represent the estimated bulk S concentrations of Mars and Earth. The filled circle shows the S concentration of a planet formed by giant impact (GI) of two protoplanets formed from solar composition pebbles and the unfilled circle for proto-planets that formed out of pebbles already depleted compared to solar.