It seems that we cannot send messages to a particular domain. We can however receive them.
They say that their domain is not blocking us at all but I can send to the user from a yahoo account that I have.
I'm running Exchange 2000 on a clustered windows 2000 server, sp1.
When I look at the badmail dir...It says that Im getting specific error 0xc00402c7. I cannot find this error in Technet.
Also, when the user gets an NDR, it has code 4.4.7 on it which I found that says it is probably on the receiving end. Can I rule out everything on my end, that is, the configuration with my server? Thanks!!!