Windows Live Hotmail is Rejecting (Not Filtering) Spam

Windows Live Hotmail is rejecting email messages! No, I don’t mean they are flagging mails as spam, they are actually rejecting the emails–which means the emails never get to the recipient, not even into the spam folder.

As far as I can determine this only happens in a small number of cases, but the fact that it happens at all should be an outrage.

Effectively, Microsoft, at their discretion, is absolutely barring certain people from emailing Hotmail customers.

I sent three emails in three days to two friends, all rejected by Hotmail; one of them being a very important information about and airline reservations I was sending to a friend I was supposed to meet next week.

I got the following Undelivered Mail Returned to Sender message on three email messages,

I’m sorry to have to inform you that your message could not be delivered to one or more recipients. It’s attached below.

For further assistance, please send mail to

If you do so, please include this problem report. You can delete your own text from the attached returned message.

The mail system

: host mx1.hotmail.com[65.54.245.8] said: 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 (in reply to MAIL FROM command)

Did my friend get the email or not? Well, from the error message I received, it appears they did not.

WTF? Now Microsoft is deciding who you can send email to and who you can receive emails from?

This is the line that scares me the most:

Reasons for rejection may be related to content with spam-like characteristics or IP/domain reputation problems.

Rejection means the email never, ever gets to the recipient. Never. Ever.

The problem with rejecting (as opposed to filtering) potential spam is that Microsoft is making an absolute determination on what email you can receive, rather than offering a tool that assists you in filtering your email. When emails are filtered, Microsoft is allowing you to get all your emails even though they might suggest it is spam and put that in some place other than your Inbox–but you can still access it. When it is rejected, you do not and cannot get your email–Microsoft has made an irrevocable decision for you.

Do you trust Microsoft to make these decisions for you?

For me the answer is an emphatic NO!

How can you trust an email provider–even if their intention is to be helpful and benevolent–that rejects some of your emails on your behalf? An email system is useless if it’s not 100% reliable and no automated system that rejects emails can determine what is relevant to me 100% of the time.

This is not a trivial situation.

What You Can Do

Please let Microsoft know that they do not have the right or authority to make decision on what emails you can send to their customer or what emails you can receive. if you are a Hotmail customer! Send a message to Windows Live Hotmail Feedback and let them know this is not acceptable!

If you have a Hotmail account, sign up for Gmail and send all your friends an email telling them you are no longer using Hotmail and why.

Then again, if your friends are using Hotmail, maybe you should call them–you can’t be sure that they will get the email.

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