Account registration disable

Dear all

Hello, I was trying to register dHCP account. However, my email was unable to register (it is University account NOT PERSONAL).The notification “email send failed” is displayed.
I submitted my inquiries through the contact page on your website but haven’t heard back. I am wondering if anyone could advise me about this registration issue?? I can not re-register because it already has my information on file (3 personal email and 3 institutional email).

Thanks in advance for any suggestion!