Sep 07 2023 08:48 AM
Hi,
I manage an Exchange environment and we are merging with a new company. The requirement is for a new domain to be setup and hosted by ourselves. All users will have this domain but a handful of users will have their mailboxes hosted on the other organizations mail server with a different primary domain. For these users we will be forwarding their email over to the other server. They will then need to be able to reply as our domain name (we will work on all required DNS records to get this part working).
Question is the best way to forward those emails across to the other mail server and meet all 3rd party email DNS checks etc. Testing forwarding from our external mail gateway and also Exchange server.
When adding an accepted domain I can make it an internal relay as not all recipients exist in my org. Would this scenario work without an Active Directory trust between the two orgs? Would the send connector for that domain happily route over the internet to the other orgs mail server or does it need to be private.
Thanks
Sep 07 2023 04:07 PM
Sep 08 2023 02:27 AM
Thanks Dan. Without that link in place would the connectors in theory work ok over the internet? Once we plug the two together we can then flip these to be private.
I have been testing the forwarding scenarios and having mixed results depending on where the forward is set at gateway or exchange level. Have seen failures when forwarding from Exchange when the originating sending domain has a dmarc policy set to reject.
Appreciate the reply!
Sep 10 2023 04:52 PM