How do we configure DKIM for BI Bursting

Summary:

How do we get DKIM for BI Bursting when we can have multiple from email address based on business unit

Content (required):

When the emails are sent out to the customer from BI Bursting with the Invoice details or the customer statement, the customer are reporting many times they do not receive the email and for some customers, the emails are in the customers junk folder.

To avoid this issue, our mail server team has already added SPF and now the mail exchange server team is looking for the DKIM details.

The Exchange server team has got back to us with this feedback " The current situation is that we're lacking the DKIM information as requested below, which leaves the company vulnerable to impersonation attacks which we know are ongoing. It is important to have this configuration in place."