An email is sent to this address to verify your identity. Since the PreVeil account that gets created is permanently associated with this email address, it is important that personal PreVeil accounts be created with personal email addresses (not work email addresses).
You do not have to enter a password to create a PreVeil account. Your private key is your password. This makes for a much more secure account because:
No one can steal your key--it's never stored on a server
The key is random and lengthy--it cannot be guessed
Keys are unique and not recycled--it's yours and yours alone
It is not necessary to install PreVeil into Outlook in order to send and receive encrypted emails. You can also do all of that in PreVeil's webmail app from your browser.