Mail Delivery Failed: Outgoing to Hotmail or Live

We are aware of an issue that is preventing email from being sent to and recipients.  When sending an email to one of these domains, you may receive an email from “Mail Delivery System” with the subject “Mail delivery failed: returning message to sender” with the following message:

host []: 550 SC-001 (SNT0-MC2-F50) 
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

We are working hard to resolve this issue and we will keep you posted on any progress.

We apologize for any inconvenience this issue may cause.

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