flood of mail notificATION CRASH SERVER

[محروم.كوم]

hello this message crash my server and make it hung up

and make my server down


please help me how can i disabled this mail notification









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Displaying Message ID 1Md00N-0006v3-Us
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1Md00N-0006v3-Us-H
mailnull 47 12
a
1250507039 0
-ident mailnull
-received_protocol local
-body_linecount 36
-max_received_linelength 162
-allow_unqualified_recipient
-allow_unqualified_sender
-frozen 1250507041
-localerror
XX
1
[email protected] web site.com

158P Received: from mailnull by host.my web site.com with local (Exim 4.69)
id 1Md00N-0006v3-Us
for [email protected] web site.com; Mon, 17 Aug 2009 07:04:00 -0400
043 X-Failed-Recipients: admin@my web site.net

029 Auto-Submitted: auto-replied
064F From: Mail Delivery System
032T To: [email protected] web site.com
059 Subject: Mail delivery failed: returning message to sender
053I Message-Id:
038 Date: Mon, 17 Aug 2009 0759 -0400

1Md00N-0006v3-Us-D
This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:

admin@my web site.net
retry time not reached for any host after a long failure period

------ This is a copy of the message, including all the headers. ------

Return-path:
Received: from nobody by host.my web site.com with local (Exim 4.69)
(envelope-from )
id 1Md00G-0006t2-Ev
for admin@my web site.net; Mon, 17 Aug 2009 0755 -0400
To: admin@my web site.net
Subject: vBulletin Database Error!
From: admin@my web site.net
Message-Id:
Date: Mon, 17 Aug 2009 0752 -0400

Database error in vBulletin :

mysql_connect() [function.mysql-connect]: User hostfors_admin has already more than 'max_user_connections' active connections
/home/hostfors/public_html/includes/class_core.php on line 311

MySQL Error :
Error Number :
Request Date : Monday, August 17th 2009 @ 0752 AM
Error Date : Monday, August 17th 2009 @ 0752 AM
Script : http://www.my web site.com/image.php?u=34830&type=sigpic&dateline=1243984370
Referrer : http://www.my web site.com/showthread.php?p=910205
IP Address : 79.176.66.94
Username :
Classname : vB_Database
MySQL Version __DEFINE_LIKE_SHARE__