Can I change email address on my Samsung account?

[AC Question]

I have been using a Samsung phone for some years, and everything is synced to my samsung account. Now I am using a different email address and want to stop using my old address. Can I change the address in my Samsung account without loosing contacts, smses and everything else saved on my phone?
I do have contacts and calender saved tomy google account, but smses and other things on my phone I don't have anywhere else.