Roundcube can send but not receive!?

Hello
I want to use a trial ssl certificate for my website: videoclipsyt.ga
and i use comodo.com and they would send a verification code to: administrator@videoclipsyt.ga so I maked the webmail but I still don’t receive that verification mail! I tried to send a mail and that works.
Can somebody help me?

I also set the mx record but nothing happens