I can't post messages

[j...@sferacarta.com]

When I try to email to the group I get this error:
-------------------------------------------------------------------------------
We're writing to let you know that the group you tried to contact (sqlkit) may not exist, or you may not have permission to post messages to the group. A few more details on why you weren't able to post:

 * You might have spelled or formatted the group name incorrectly.
 * The owner of the group may have removed this group.
 * You may need to join the group before receiving permission to post.
 * This group may not be open to posting.

If you have questions related to this or any other Google Group, visit the Help Center at http://groups.google.com/support/?hl=en_IT.

Thanks,

Google Groups



----- Original message -----

X-Received: by 10.14.220.131 with SMTP id o3mr20124078eep.3.1359906854845;
        Sun, 03 Feb 2013 07:54:14 -0800 (PST)
X-Received: by 10.14.220.131 with SMTP id o3mr20124077eep.3.1359906854834;
        Sun, 03 Feb 2013 07:54:14 -0800 (PST)
Return-Path: my_email
Received: from smtp203.alice.it (smtp203.alice.it. [82.57.200.99])
        by gmr-mx.google.com with ESMTP id m6si3178918een.1.2013.02.03.07.54.14;
        Sun, 03 Feb 2013 07:54:14 -0800 (PST)
Received-SPF: neutral (google.com: 82.57.200.99 is neither permitted nor denied by best guess record for domain of my_email) client-ip=82.57.200.99;...