Yahoo! mail removed their FBL (Feedback Loop) process with ESP's like Blackbaud a while ago. They now offer a client-based version that each interested client must complete from their side. Interested clients would need to complete the Yahoo Complaint Feedback Loops Service form. The two pieces of information that you need from Blackbaud are the following:
  • Receiving email address field: feedback-loops@convio.net
  • Selector field: selector1