We have a notes server at
notesserv01.intra.contoso.com that processes our regular email, and an exchange server at
exchserv01.intra.contoso.com for testing purposes.
Lotus Notes email addresses are of the form
firstname.lastname@example.org, Exchange email addresses will be of the form
email@example.com. So, we already made an MX record for intra.contoso.com in our ActiveDirectory DNS server.
When we send emails to
firstname.lastname@example.org from Lotus Notes, it is not delivered to the Exchange server. Instead, Domino server tells us that it could not find that email address in the Notes directory:
Error transferring to INTRA.CONTOSO.COM; SMTP Protocol Returned a Permanent Error 550 5.1.1 : Recipient address rejected: User unknown in relay recipient table
How do we tell Lotus Notes to send
@intra.contoso.com emails to the Exchange server?