Anyone from Microsoft / Outlook.com / Office365 around? We are having a problem with email from a certain IP being rejected with code FBLW15. We have gone through the normal channels but have received no communication/acknowledgement from Microsoft at all. Emails to any domain with *outlook.com MX records are rejected with the following: --- host klatencor-com0i.mail.eo.outlook.com[207.46.163.138] said: 550 5.7.1 Service unavailable; Client host [65.111.<snip>.<snip>] blocked using FBLW15; To request removal from this list please forward this message to delist@messaging.microsoft.com (in reply to RCPT TO command) --- We have emailed delist@messaging.microsoft.com, with no response. The IP in question is not showing up on any blacklists that we have searched (mxtoolbox, multi-rbl-check, etc etc) Thanks -Robert