Both should be okay with an important observation.
As-Salam is an attributive name of Allah. Think of 'ASSALAM on you'. The Qur'an mentions SALAMUN ALAIKUM.
6:54 When those who believe in Our Revelations come to you, say, "Salamun alaikum" - Peace on you! ................
Please correct REHMAT to RAHMAT and provide your location.
No big deal :-)