I got these emails too. First one announcing they were offering a chance to play Daoc for 7 days free to celebrate the 7th anniversary of Daoc EU. Then an email saying my account had been opened and a dodgy link that seems to go through orange.fr Aren't GOA part of France Telecom, and Orange part of the same group, so perhaps this is legitimate?
My guess is that it is a legitimate email from GOA, just bungled in their usual way and perhaps a scam by them to try and reopen accounts again, they'd best not activate any old credit card details or there will be a legal storm. I doubt they are
that stupid.
The fact that the email saying a free period was available arrived a full 24 hours after said free period actually started is
VERY GOA ... scammers would never be so slack

If it is genuine, I confess I'm curious as to who might actually log in. But if GOA think I'm going to legitimise any attempt by them to re-open my Daoc account and potentially scam me again, they can go feck themselves.