With UpViral you can now add email addresses and IP addresses that you want to Blacklist or prevent from joining your campaigns, contests and rewards. This can help you permanently stop spam contestants from specific email addresses or IP address.
To add email or IP Addresses to the blacklist:
Go to Settings menu.
Under General Settings page, scroll down to the Blacklist segment.
From this point, you'd be able to add email addresses and IP addresses for blacklisting by pasting in its own line.
Click Save at the top to apply changes.