In a nutshell - it's a scam. Throw it away.
Domain Registry of America is using the unscrupulous practice of sending solicitations that look like emails in the hopes that you will pay it, thinking it's renewing your domain name. What it is actually doing is TRANSFERRING your domain name to them. If that happens, it is VERY difficult to get it back to Scarlet's Web. We will no longer be able to offer any support/reminders/billing services for your domain name.