Good afternoon, a few days ago I tried to register an acoount but my application was declined because of the fact my e-mail address was considered a free one. But it's not free! I pay for the hosting of the site and with that I get my e-mail account, so I guess it's not free...
Please help me if you can.
Thanks in advance

Normally you would need an admin@, owner@, etc type address then.

admin@ and webmaster@ are the approved e-mail accounts for personal domains. This is clearly stated on the join page, which you should have thoroughly read prior to signing up.