[Feature request] Please add an option to make Grommunio authoritative/non-authoritative for a domain in a "split domain" case

[Photon89]

Hi guys,

we were hit by the issue that only a part of the mailboxes was actually managed by Grommunio, the others were external ("split domain"). In the default configuration mails sent by Grommunio to one of the external addresses could not be delivered. It would be great to have an option to tell Grommunio to be not authoritative for the domain and set a relay host which is then used for addresses that are not managed by Grommunio. For reference please also see here (thread in German): https://community.grommunio.com/d/2640-mails-an-externe-adressen-mit-gleichem-domainnamen-kommen-nicht-an

Best,
Photon89