Hey guys,
The Distribution group option Only senders inside my organization doesn't seem to be working properly, I can still send e-mail from external account to the groups. Only if I use a specific users in the list will it reject external users. Anyone know how this works from a back end perspective? My only hunch feeling at this point is because all my e-mail is going through a spam firewall and then to Exchange so it thinks that is an internal trusted system so it's treating anything through that as internal but that's the only thing I figure it could be. Anyone have some ideas? Thanks!
