Following links may help:
http://www.wpunzipped.com/problem-sending-a-mail-from-wordpress-use-wp-mail-smtp/
http://angstrey.com/index.php/2009/04/22/how-to-send-e-mail-with-wordpress-from-godaddy-windows-hosting/
http://www.technoreply.com/fix-failed-to-send-your-message-please-try-later-or-contact-administrator-by-other-way/