Users can receive from a specific outside email address but cannot send to it from outlook. They can send successfuly from OWA and iphone to that specific address.

Users can receive from a specific outside email address but cannot send to it from outlook.

They can send successfully from OWA and iphone to that specific address.

Fails in Outlook 2003, 2007,2013.

We are using exchange2010.

The following recipient(s) cannot be reached:

           You do not have permission to send to this recipient.  For assistance, contact your system administrator.