[kh99]

There is no setting to disable them. If you wanted, you could edit file includes/functions_login.php and in function exec_strike_user(), around line 109, find this code:

if ($strikes_user['strikes'] == 4)		// We're about to add the 5th Strike for a user
{
	if ($user = $vbulletin->db->query_first("SELECT userid, username, email, languageid FROM " . TABLE_PREFIX . "user WHERE username = '" . $vbulletin->db->escape_string($username) . "' AND usergroupid <> 3"))
	{
		$ip = IPADDRESS;
		eval(fetch_email_phrases('accountlocked', $user['languageid']));
//		vbmail($user['email'], $subject, $message, true);
	}
}

and add the two forward slashes (in red) before the vbmail line.

I'm also working on a couple of mods that might help with this. One will allow human verification on login (after a configurable number of strikes) so that hopefully the guessers (assuming they're automated) will not be able to generate 5 strikes. The other one will just allow you to disable the email sending without editing a file (and maybe also give options for other types of notification, if I can get around to it).