Prevent External mail going to DG's

[coch]

Is there an easy straight forward way to prevent any external mail going to any Distribution groups that we have set up internally?

If there isn't a staright forward easy way is there any way??

 

[ErikU19]

On the exchange general tab of the group there is a message restrictions section. have fun

 

[Zelandakh]

remove their SMTP addresses. Then it is internal only.

 

[xmsre]

Removing the SMTP address means you can't send to that smtp address. The DG still has a directory name, and you can still use imcea encapsulation over smtp to send to it. Your best bet is a restriction at the connector.