Help me understand

Hello new to this server because as a my local libarie playing minecraft ffound this server and it was good so was on my device connected to a computer and check my mail and have msg from this website and the user was nudus o nidus gref or something and they were talking about op and hacking and may someone plz delte this account from my mail because this is a inconvinece for me and would be happy to sort this out because  i do not appricate or like hacking of my stuff or others espically my private email