Only one more step to take...
You've been sent a verification email which you must open in order to be added to the mailing list. Simply check your email looking for a subject line which starts with RESPONSE REQUIRED.
(1) Click the link in the email
Inside you'll find a verification link you can click. Which will then complete the process.
(2) Whitelist this address!
Make sure and whitelist firstname.lastname@example.org. This may be as easy as adding it to your integrated address book.