We have an implementation of SharePoint with over 2000 users. For all notifications we are using a fake administrator email account for the From field. eg)email@example.com - no actual email account.
This works fine in most cases as we don't need to receive email to this account.
We are having a problem though with Workflow notifications not going through to Active Directory Distribution Lists if the option to allow emails from outside of the organization is disabled - since the email account doesn't actually exist. We do not want to enable this option in our organization.
Just wondering if there is any risk or impact of creating a real email account for outgoing notifications. I don't know the rational for the original fake one as our previous administrator is no longer at the organization.