I have read the postmaster doco at MSN. I have put SPFs for SenderID into many of my news station domains but it doesn't seem to be affecting my success at delivery over other domains which do not yet have any such configs. What am I missing to get un"blacklisted"? I can't seem to find any human contact info on there.
What I did in the past in a similar situation was sign up for an MSN account, complain that my office couldn't email me, and keep escalating until I reached somebody who understood the problem. Of course the circumstances were somewhat different, and a spammer in a nearby netblock had ignored them and they ended up blacklisting the whole /24 instead of just the spammer's /27-- but it's still probably worth a try. -- Dave Pooser, ACSA Manager of Information Services Alford Media http://www.alfordmedia.com