Delivery Management - Only senders inside my organisation

[MikeBrunel]

Does anyone know how to enable this option for our all_staff groups which we created in AD locally but just want to switch on the internal emailing only to not allow spammers or any external person emailing that group? When selected in 365 I get the message that this has to be done in AD as it is sync'd with the 365. There must be a simple way to turn this on without have to set rules for it in Mail Flow.

 

Is installing the exchange management tools on the DC to update the schema the way to go about this?

 

 

 

Any help or views on this will be appreciated.

 

Kind regards

 

Mike

[glen_j]

you can create a transport rule to reject email to that address from outside the organisation it's under mail flow > rules.

[MikeBrunel]

Thank you but I cannot see the rule I want within those rule options. E.g. The Sender is located Outside the organisation and the Recipient is BSM All Staff then Block?

 

Oh and thank you for such a quick reply.

[ThomL]

In 365 head to the rule creation area, select add new rule - in the pop up windows you have to click the blue "More options..." text to be able to get the rule as granular as you want it: