We are having our emails to hotmail and live mail blocked with with the following response. This began to happen Wednesday morning GMT. We sent a circular to our member-base the evening before, so this may be related.
Previously, we have had no issues delivering to Hotmail/Live, our SPF records are correct and we have unsubscribe links on our outbound newsletter.
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Reporting-MTA: dns; gate1.bullionvault.com
X-Postfix-Queue-ID: 2F48EC03BF
X-Postfix-Sender: rfc822; {removed email address}
Arrival-Date: Wed, 3 Jun 2009 10:00:05 +0000 (UTC)
Final-Recipient: rfc822; {removed email address}
Original-Recipient: rfc822;{removed email address}
Action: failed
Status: 5.0.0
Remote-MTA: dns; mx4.hotmail.com
Diagnostic-Code: smtp; 550 SC-001 Mail rejected by Windows Live Hotmail for
policy reasons. Reasons for rejection may be related to content with
spam-like characteristics or IP/domain reputation problems. If you are not
an email/network admin please contact your E-mail/Internet Service Provider
for help. Email/network admins, please visit http://postmaster.live.com for
email delivery information and support