I'm hoping someone can help me. I've been blocked by Hotmail too many times, and finally I got an answer that makes sense from them.
I have MailScanner installed, and despite that I have set the default scanning to be To (not FromOrTo) and have switched all domains to To - I am still seeing the MailScanner headers being added to outbound mail.
I have 'hacked' around this by configuring MailScanner to believe each 'informational' header should say 'X-Ignore' and set the values to 'ignore'. This gives me one X-Ignore: ignore header in my outbound mails (a bit pants, but hopefully won't annoy Microsoft's anti spam filters). It's also a bit annoying because I really would like those headers for inbound messages.
The only thing left is a bogus X-Spam-Status header which invariably says X-Spam-Status: no. It's being added to my outbound messages and that causes most antispam software to increase the spam score (because many spammers in the early days thought it'd be fun to try to subvert spam filters by adding headers such as these).
So, my question is, how do I stop outbound mail from having the X-Spam-Status header?