I'm running XCH 2007. I have a distribution group that has been set up for years and never had problems with it. Now it seems that only 1 person in the distribution group is getting emails, and no one else, including me, are.
I see no errors or anything pointing to the problem.
Where do I even start to look?? It's an outside client that's having problems and I do have access to theirs and our XCH servers.