I would like some help on clarification with using the send as permission for a distribution group. I want to have a distribution group set up for our support reps with an email address of "firstname.lastname@example.org"
I want to grant the reps the ability to send out emails as "email@example.com" using send as permission.
So far I've created a universal distribution group from the ECP and made the support reps members and allowed the send as permission on the security tab for the group.
Next I granted the send as permission for the DL using the ECP. On a clients outlook it will allow me to choose the "firstname.lastname@example.org" email to populate the "from" field.
However, all my test emails come back immediately with this error:
This message could not be sent. Try sending the message again later, or contact your network administrator. Error is [0x80070005-00000000-00000000].
I had this setup working previously with our old server, but obviously I am forgetting a step somewhere?