I've been able to get emails through to Hotmail/Live/MSN accounts from my own mail servers after explicitly notifying the Microsoft postmaster of my domain and

I've been able to get emails through to Hotmail/Live/MSN accounts from my own mail servers after explicitly notifying the Microsoft postmaster of my domain and valid SPF record. (Just having the record wasn't enough.) Here's the form I use: https://support.msn.com/eform.aspx?productKey=senderid&page=support_senderid_options_form_byemail&ct=eformts&scrx=1 https://support.msn.com/eform.aspx?productKey=senderid&p...