I need to configure external smtp relay with authentication on exchange 2013 server.
I went through the article below :
https://practical365.com/exchange-server/exchange-2016-smtp-relay-connector/
This article explains how to setup external SMTP Relay with Exchange Server 2016 Using Authentication, but I guess it is still relevant to exchange 2013. Is that correct?
So I tested the external relay by using the "Send-MailMessage" powershell command and using port 587 (without ssl switch as we don't have cert on that connector).
It did not succeed without credential as expected and succeeded with credential as expected.
On-premises exchange servers send to office 365 and then it should go out to internet.
How can I get confirmation that it was using “SERVERNAMEClient Frontend SERVERNAME” connector for receive.
If I enable "RequireTLS" on this connector then are there any issues I should be aware of?
And which send connector it is using to send out to Office 365.
As per the article below it should be going through the send connector that is set to use "<OurDomain>-com.mail.protection.outlook.com":-
https://docs.microsoft.com/en-us/exchange/mail-flow-best-practices/use-connectors-to-configure-mail-flow/set-up-connectors-to-route-mail
I need to ensure that TLS 1.2 is used between on-premises exchange and office 365. Thus I need to ensure which connector it is going through.