Thanx for the reply,
It did help in a way, I know I need to look further
Strange thing is that I could send mail to them for wel over a month since I made the last change. Another friend had a similar problem, If yahoo and hotmail have blocked for eiter reason I suppose this would be a good thing. I only use my hotmail account if disclosing my email would likely result in spam and I hardly ever read it anyway.
I have posted it the same question now in alt.comp.mail.postfix. Where it should probably have gone in the first place