Article ID: 127894, created on Dec 26, 2015, last review on Dec 26, 2015

  • Applies to:
  • Plesk 12.0 for Linux
  • Plesk 11.0 for Linux
  • Plesk 12.5 for Windows
  • Plesk 12.0 for Windows


Mails are not getting delivered to Hotmail accounts due to the following error:

Message could not be delivered to some recipients.
The following recipient(s) could not be reached:

Recipient: []
Reason: 550 SC-001 (BAY004-MC1F30) Unfortunately, messages from weren't sent. Please contact your Internet service provider
since part of their network is on our block list. You can also refer your
provider to


The mail server's IP is blocked by Hotmail.


Hotmail is blocking the mails from the server according to their spam policy. This can be caused as they found high volume of emails from your server.

Refer the following article to get more information regarding this error in SMTP Error Codes section:

Mail rejected by for policy reasons. Reasons for rejection may be related to content with spam-like characteristics or IP/domain reputation. If you are not an email/network admin please contact your Email/Internet Service Provider for help.

To resolve this contact Hotmail support.

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Message could not be delivered to some recipients

550 SC-001

Message could not be delivered to some recipients

unable to send to hotmail

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