[Netkit.users] Mailing List Test - cannot write from Tor Vergata

[ZioPRoTo (Saverio Proto)]

Sorry for the SPAM, some people from Tor Vergata is trying to post to
this list, but looks like vvv.dia.uniroma3.it does not accept mail
from our smtp lists.uniroma2.it

   ----- The following addresses had permanent fatal errors -----
<netkit.users a vvv.dia.uniroma3.it>
    (reason: 554 5.7.1 <netkit.users a vvv.dia.uniroma3.it>: Relay access denied)

is our server blacklisted ?

Saverio