Within the last two days, I've noticed a lot of "Message Delivery Failure" messages when subscription notifications are sent to a registered users with Hotmail addresses. Why would this happen all of a sudden, and is there anything either I or my users with Hotmail can do?
MailEnable: Message could not be delivered to some recipients.
The following recipient(s) could not be reached:
Recipient: [SMTP:[email protected]]
Reason: 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
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