I have set postfix to send mail, but haven't done it properly such as setting up ptr records, DomainKeys and Sender IDs. All the mail sent to gmail.com accounts get into Spam folders (which is fine), but live.com and msn users just don't receive it at all, nothing in Junk. Is it possible for live.com to drop mails entirely without user consent? MSN/Live.com is doing something that Google isn't doing.
EDIT: From: http://mail.live.com/mail/junkemail.aspx
If a message has an SCL rating lower than a certain threshold, it is considered spam and a rule then deletes the message rather than send the message to the users’ junk e-mail folders.
Seems my mails have failed their Spam Confidence Level and just deletes it without sending it to the junk folder. What are the steps involved to increase SCL so that it at least gets into Junk other than to setup DomainKeys and so many details that are involved. I have already done PTR/rDNS and test it, doesn't' work yet.