hey dud3z, Tyler here from DO Security. If you respond to the note we sent you, we can share back specific details. In all but a small number of cases, it was the email address and name you entered for your DO account.
I already replied back at the mail from my business account (@r31nv3nt3d, need to un1337 it) with some questions minutes after receiving it, looking forward for a reply there, thanks!