Confirm your email
After signing up, open the verification message sent to your account email address and follow its verification link. Your account email can be different from the mailbox address you are buying.
If the message has not arrived
Check your junk or spam folder and confirm that you entered the correct email address. If the verification screen offers a resend option, use it to request a new message.
If the link has expired or verification still fails, contact support. Never send your password or a verification link in a public message.