If you send mass email messages, you probably see a lot of bouncebacks that look like this:
Remote host said: 550 SC-004 Mail rejected by Windows Live Hotmail for policy reasons.
So what the heck does bounce code "550 SC-004" mean? The Email Experience Council’s Deliverability Roundtable (Chris Wheeler of Bronto Software, Jack Sinclair of Return Path, and Josh Baer of OtherInbox) has put together a list of common email bounce codes to help decode why your emails might not be making it to their intended recipients.
Photo: Balakov
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