Warning: fopen(/domains/smtp-error-codes.info/public_html/bezoekers.log): failed to open stream: Permission denied in /domains/smtp-error-codes.info/public_html/includes/log_bezoeker.inc on line 15 Warning: fwrite() expects parameter 1 to be resource, boolean given in /domains/smtp-error-codes.info/public_html/includes/log_bezoeker.inc on line 16 Warning: fclose() expects parameter 1 to be resource, boolean given in /domains/smtp-error-codes.info/public_html/includes/log_bezoeker.inc on line 17 Hotmail bounce message 550 SC-003
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Hotmail bounce message 550 SC-003

Mail rejected by Outlook 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.

Stop all this jibber jabber, what does it mean?

You are running a badly configured mail server. Your mail server is accepting email from anonymous users. This means your mail server is at the risk of being abused by spammers and so receiving mail servers refuse to receive anything from your mail server.

Did I do something wrong?

Yes.

How can I fix this?

Shut down your mail server! Only restart it once you are certain you have fixed the problem.