I have an issue that I am curious about getting some feedback on. I built a transport rule in a Exchange 2007 SP2 to block email from a specific distribution list to recipients external to our organization.
During the testing, I added myself to the distribution list. It seems to be working, so I removed myself, but now it still thinks that I am in the distribution list.
Does anyone have an explanation for this? I found an section on TechNet that talks about it the Expanded Groups cache storing group membership for 4 hours, but then I noticed that that article was applying to 2013, so I'm not sure if that applies.
Anyway, it's not a big deal because I just disabled the rule for the time being. But, eventually I need to get it enabled and I'd like to know what's going on here. Maybe restarting the transport service will reset it, but I'd rather not have to do that. If it's just a few hours, then that's fine, I can wait it out for changes.