I created a 'test' account, and tried sending to it. Here is the message I got from yahoo. I got the exact message when I sent it from an outlook account too, except for its a different ISP. It is obvious, this is not an ISP or configuration problem with my account. Here is the error messages with the headers.
X-Apparently-To:
caminator@yahoo.com via 216.136.174.83; Thu, 19 Feb 2004 09:48:21 -0800
Return-Path: <>
Received: from 216.136.174.83 (HELO web13121.mail.yahoo.com) (216.136.174.83) by mta176.mail.scd.yahoo.com with SMTP; Thu, 19 Feb 2004 09:48:20 -0800
Date: 19 Feb 2004 17:48:20 -0000
From:
MAILER-DAEMON@yahoo.com Add to Address Book
To:
caminator@yahoo.com Subject: failure delivery
Content-Length: 586
Message from yahoo.com.
Unable to deliver message to the following address(es).
<
test@northtechconsulting.com>:
64.235.234.14 does not like recipient.
Remote host said: 550-web13121.mail.yahoo.com [216.136.174.83] is
currently not permitted to
550-relay through this server. Perhaps you have not logged into the
pop/imap
550-server in the last 30 minutes or do not have SMTP Authentication
turned on
550 in your email client.
Giving up on 64.235.234.14.