If I only use normal Nginx without Apache as backend then SSL is 100 % working I tested it.
Therefore there is no problem with dns setting and I removed MX Record.
Problem only with NginxProxy .
If problem not solve, I think I have no option I have to use separately either Nginx or Apache for SSL
You should test NginxProxy in your Server with SSL Enable in Kloxo-Mr 7 Beta Version .