security@ email not working?

[Bastien Nocera <hadess@xxxxxxxxxx>]

Hello,

I sent a mail to the security list on Friday, and got a "not delivered"
message today. Can somebody check whether it works, and let me know
where I can send my mail? Urgently...

<security@xxxxxxxxx>: host mail.bluez.org[212.227.132.17] said: 454 4.7.1
    <security@xxxxxxxxx>: Relay access denied (in reply to RCPT TO command)

Cheers