Microsoft blocking mail

Is there anyone on-list who can assist with an erroneous spam block to Outlook.com <http://outlook.com/>? One our our net blocks was added earlier today, 216.128.11.0/25 and I am having zero luck getting through to a clueful person at MS. Thank you! Chris Garrett | Network Operations Director tel: 678.370.2012 | mobile: 512.605.9620