Somebody's sending spam out from our servers. Obviously I've already banned him, but that's not the point.

All accounts are limited to 20 emails per hour. How can I stop this happening?

Also, by the way, it's actually 20 emails per domain, I believe. So if one user is user1.domain.com and another's user2.domain.com, are the emails "deducted" individually or just for domain.com?

1FIVcW-0004Fx-N7-H
cpanel 32001 32001
<jaymarley@message.com>
1142189328 0
-ident cpanel
-received_protocol local
-body_linecount 30
-auth_id cpanel
-auth_sender cpanel@alpha.1freehost.net
-allow_unqualified_recipient
-allow_unqualified_sender
-local
-sender_set_untrusted

...

122P Received: from cpanel by alpha.1freehost.net with local (Exim 4.52)
id 1FIVcW-0004Fx-N7; Sun, 12 Mar 2006 12:48:49 -0600
138P Received: from 81.199.144.186 ([81.199.144.186]) by capone.1freehost.net
(Horde MIME library) with HTTP; Sun, 12 Mar 2006 12:48:39 -0600
067I Message-ID: <20060312124839.ak8htz1enogkwogc@capone.1freehost.net>
038 Date: Sun, 12 Mar 2006 12:48:39 -0600
042F From: Jake Marley <jaymarley@message.com>
029T To: undisclosed-recipients:;
027 Subject: Proposal For You.
018 MIME-Version: 1.0
046 Content-Type: text/plain;
charset=ISO-8859-1
028 Content-Disposition: inline
032 Content-Transfer-Encoding: 7bit
056 User-Agent: Internet Messaging Program (IMP) H3 (4.0.3)

--

Thanks