Hi Sir/ Mam,
I plan to deploy zimbra open source to my environment. My current setup are we have external mail that hosted on mail provider. And we have also exchange server on our local environment.
My email address on external mail are firstname.lastname@example.org and my internal mail are email@example.com too. Currently Our setup if we email on other domain like yahoo.com. Our exchange server relay the message to smtp provided of isp.
If this possible on zimbra. Because we are not plan to deploy zimbra to replace our external mail. We use only zimbra in internal mail.