I have just replaced my Exchange 2003 server with Zimbra. The mail migration went well but now I have some serious SMTP aka spam issues. I host multiple domains on the server and I would like to make sure that while sending the Zimbra SMTP MTA identifies itself correctly.
If the email address is email@example.com Zimbra should use mail.abc.com but if the sender is firstname.lastname@example.org it should use mail.zxy.com.
How can I configure that? Right now it sends all mails with the hostname (in my case anduin.athome.local). Result is that my mails are classified as spam (sender name and DNS MX records do not match)