Hi,
I have a problem with sending Email between two domains.
This is my architecture :
- I have two domains in different subnets.
- On each domain, I have two machines: the first one has the mailbox and the CAS, the second has the Domain controller
- The same for the second domain.
- I configurate the Domain controllers with the appropriate zones and records.
- Everything works well internally on each domain and the mail flow works (sending and receiving).
- The communication between the two subnets works great.
for sending to the other domain, I configure the send connector with the right parameters.
When I try to send a message to a user in the other domain, I get this Error.
ERROR 451 4.7.0
I checked online a few forums nothing helps.