Hi,
we use an external journal mailbox with a transport rule for all outgoing/incoming mails - setup in exchange admin center onilne.
However the SENDER address of all that mails is not configurable. It's something@tenant.onmicrosoft.com
As the SPF-policy for onmicrosoft.com is strict (-all), problems arise if mail is forwarded, as it breaks SPF.
How can we set the real domain as sender address (@customer.com). These domain is the primary mail domain, that is routed to exchange online.
Thank you.
