mail() and Verizon

Can anyone tell why the mail (see below) is not being relayed to robin.vask@verizon.net: #Note: There were 2 "To:" addresses. Below is the header from the successful mail to the second address. <header> Return-Path: <shoerner@web2.nsservers.org> Delivered-To: sam@arraymedia.com Received: (qmail 70862 invoked by uid 399); 1 Oct 2004 00:49:10 -0000 Received: from unknown (HELO web2.nsservers.org) (204.118.173.14) by mail.nsservers.org with SMTP; 1 Oct 2004 00:49:10 -0000 Received: from web2.nsservers.org (localhost [127.0.0.1]) by geb2.nsservers.orw (8.12.9p2/8.12.8) with ESMTP id i910WJwe018715; Thu, 30 Sep 2004 17:32:19 -0700 (PDT) (envelope-from shoerner@web2.nsservers.org) Received: (from shoerner@localhost) by web2.nsservers.org (8.12.9p2/8.12.8/Submit) id i910WJDE018714; Thu, 30 Sep 2004 17:32:19 -0700 (PDT) Date: Thu, 30 Sep 2004 17:32:19 -0700 (PDT) Message-Id: <200410010032.i910WJDE018714@web2.nsservers.org> To: robin.vask@verizon.net, sam@arraymedia.com Subject: Testing the simple mail functions From: sam@itab.com </header> Could the mail server running on web2.nsservers.org be mis-configured? Is there something missing in the header? This mail is being generated from the PHP mail function in a web page. The PHP line is: mail("robin.vask@verizon.net, sam@arraymedia.com", "Testing the simple mail functions", "Did you get this one?", "From: sam@itab.com \n"); Thanks