This account is having problems again. Email sent to a known address that often gets through is being rejected. Here's the bounce headers. Please advise.

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:

vsanpere@holistika.us
SMTP error from remote mail server after RCPT
TO:<vsanpere@holistika.us>:
host mx1.biz.mail.yahoo.com [67.28.113.136]: 550 relaying denied for
<vsanpere@holistika.us>

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Return-path: <doug@dougjmoore.com>
Received: from cpe-24-165-165-21.neo.res.rr.com ([24.165.165.21]:1355
helo=Dell)
by hostnet.clevelandwebseo.com with esmtpa (Exim 4.69)
(envelope-from <doug@dougjmoore.com>)
id 1KsrNM-0007iX-BG
for vsanpere@holistika.us; Thu, 23 Oct 2008 00:00:44 -0400
From: "Doug Moore" <doug@dougjmoore.com>
To: "Veronica Sanpere" <vsanpere@holistika.us>
Subject: Skype Students
Date: Thu, 23 Oct 2008 00:00:41 -0400
Message-ID: <002201c934c3$ec417670$c4c46350$@com>
MIME-Version: 1.0
Content-Type: multipart/alternative;
boundary="----=_NextPart_000_0023_01C934A2.652FD670"
X-Mailer: Microsoft Office Outlook 12.0
thread-index: Ack0w944+tpyIA2FQmuVjNJNxIVHRg==
Content-Language: en-us
x-cr-hashedpuzzle: Aa/r Apy2 BslT CuS3 DDe0 Dzc1 E6l+ FMPv FrDu G2Vw IKSA
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KzJw;1;dgBzAGEAbgBwAGUAcgBlAEAAaABvAGwAaQBzAHQAaQB rAGEALgB1AHMA;Sosha1_v1;7;
{AFAA8C7C-7228-48FB-A0A6-30936CB3B15E};ZABvAHUAZwBAAGQAbwB1AGcAagBtAG8AbwBy A
GUALgBjAG8AbQA=;Thu, 23 Oct 2008 04:00:20
GMT;UwBrAHkAcABlACAAUwB0AHUAZABlAG4AdABzAA==
x-cr-puzzleid: {AFAA8C7C-7228-48FB-A0A6-30936CB3B15E}

This is a multipart message in MIME format.

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charset="us-ascii"
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