Re:Contact the ISPs. (Score 1)

My company has this problem a lot. It's quite irritating when customers send us livid email saying they haven't received the download link and we have sent it 3 or 4 times. We have asked our customers to not use Yahoo or Hotmail addresses but still some do. I have tried to contact Yahoo, Hotmail and AOL to see if we are blackkisted, blocked or whatever. I was never convinced I had a good way to contact them. How did you actually contact the ISP and get someone to respond to your request. I would really appreciate specific information. Thanks a lot!