Our company is currently running a mail server with sendmail (firstname.lastname@example.org). I am going to replace it by zimbra. Now, I finished to set up a Zimbra server and wanna put it to the production line (replace the old sendmail server). However, I don't know how to replace it.
since the hostname of the new zimbra server is zimbra.mydomain.com. The new zimbra a/c are email@example.com. How can I make it to be firstname.lastname@example.org?