Systems Management

I have set up an Email rule that notifies the techs of any newly created Service Desk ticket. The Email goes to a distro list of which I am a member. Since the upgrade to 9.0.260 myself and a couple of other people no longer get the Email notifications. The group membership has not changed and our accounts have not changed. This is not affecting all of the users in the group. I don't know of any other change that was made to the system. 

Has anyone else seen this? Is there something specific, maybe in AD, that I should be looking at?

Thanks for the help.