From the documentations
“In favor of this feature we will deprecate [Hostname SSL] and [Mail Server SSL]. We recommend that rather then using two things, you could just use Setup wizard and it will take of everything for you, you don’t need to issue Hostname and Mail Server SSL.”
No it wont setup everything for you if you don’t have correct reverse DNS. So please don’t remove the option to setup mail server ssl or change the option to Do not check rDNS but create mail SSL anyway. I’ll think many ISP’s wont let you change rDNS.
Hope you understood what the issue is, my English sucks 
Mvh
Kai Michelsen