We are running exchange 2010 and have 1 exchange enviroment and we have users from a second domain that also have their email on our exchange system. What is happening is that the users inbound email keeps getting rejected by the spam filter.
We have the domain in exchange setup as a accepted domain. Our spam filter group says that there is nothing wrong on that side and they are saying that it looks like an AD issue.
So I am not sure what to check either something on the exchange server or possibly some type of AD issue?
Any help would be apprciated.