In this post, let’s have a look at the error code “550 SC-003” that you get as bounce back when you are trying to send a email via Microsoft’s Outlook.com.
Every Mail Servers that uses SMTP protocol to send emails have a list of errors that is usually displayed to the user when there is an email bounceback. Here’s we look at a specific error code that we receive and what it means for the user when using outlook ot Hotmail.
Mail rejected by Outlook.com for policy reasons. Your IP address appears to be an open proxy/relay. If you are not an email/network admin please contact your Email/Internet Service Provider for help.