I have just added MX record for mail.example.com. Previously there was MX record for example.com. we have default email address-domain @example.com - and it is working fine for send and receive. we need to get some admin-level email addresses working that ends with @mail.example.com, for example:
so we added the MX record and pointing to same server. I tested sending email to firstname.lastname@example.org and email@example.com from inside domain and I am able to receive emails to them. but from outside, I am not able to send email to those address. it says
Message not delivered
Your message couldn't be delivered to firstname.lastname@example.org because the remote server is misconfigured. See technical details below for more information.
The response from the remote server was:
550 5.7.1 Unable to relay
now, i see there are some suggestion to create new receive connector in Exchange. we have Exchange server 2013. what parameters I need to use to create the new receive connector? we already have default receive connector in both exchange servers for example.com and both inbound and outbound emails are working fine.
we have two exchange servers 2013, the servers are on cluster. each server has its own receive connectors as below.
Client Frontend <server-name> - FrontendTransport Client Proxy <server-name> - HubTransport Default Frontend <server-name> - FrontendTransport Default <server-name> - HubTransport Internal-Relay <server-name> - FrontendTransport Outbound Proxy Frontend <server-name> - FrontendTransport
any suggestion will be greatly appreciated. thanks.