To verify your email address, please login to the Account Manager and follow the instructions. Once your email has been verified successfully, you will receive 250 Dragon Crystals and you can obtain your item rewards via the NPC Hootenheim who is at the bank. Please also make sure you check your pet inventory!
You do have to have a character created on your account and an email login to be able to successfully verify your email and retrieve your items. You also can only verify your email once per account and whatever current character you have will receive the DCs and rewards.