I have a working Exchange 2K server that handles all my email on domain.com. I set up a second mail server running sendmail on RedHat Linux 7.3 so that I can use the Majordomo list server. I set up an Active Directory Contact that should forward emails sent to firstname.lastname@example.org to email@example.com.
However, my Exchange server sends back an email saying that "The destination server for this recipient could not be found in Domain Name Service (DNS). Please verify the email address and retry."
I can send messages to sendmail.domain.com from another sendmail instance on the same LAN, so I am assuming the problem is in the Exchange configuration. I have an internal DNS server and I know there is an MX record for sendmail.domain.com.
In this video we show how to create an email address policy in Exchange 2013. We show this process by using the Exchange Admin Center.
Log into Exchange Admin Center.: First we need to log into the Exchange Admin Center.
Navigate to the Mail Flow…
This video shows how to quickly and easily add an email signature for all users on Exchange 2016. The resulting signature is applied on a server level by Exchange Online.
The email signature template has been downloaded from: