So far all the messages have only contained one gold and said that 100m gold was for sale.
Please take a screenshot of the mail you received and report it to support. You can find the link in my signature.
Then, we advise you to simply delete the mails. If deleting is not possible, returning is OK, but deleting is preferred. If you accidentally accept the mail (I know some addons go through and accept and delete all the mail), no big deal, simply take a screenshot of the chat log and report it to support.
Thanks.