I am receiving the emails see below. I git this last month I had a similar issue for OS Webinars if I register for the session I was not receiving email. I contacted the Account/Sales team to get it fixed. Now am receiving all emails from OS.
Did you receive emails for Parcel service, RPTA and ACM as well? Or maybe they came out before you had your issue resolved. I do have a ticket outstanding with OS support and am awaiting their reply so we'll see.