my customer is working Microsoft Exchange Mail server, we can talked customer and we persuade use to Zimbra Mail Server. but we have got a one problem.
Customer is use to one Domain name and need to 2 mail server ( zimbra & Exchange ) 1 Domain 2 IP ( Server )
Domain is use to DNS A record mail.domainname.com >> go to Exchange mail server.
but we can need plus Zimbra mail server this sistem... and all domain name is not change....
mail.domainname.com >>> Zimbra and exchange Mail server
1 domain ( 2 IP adres, 2 Server ) is working ? is possible ?
how can I do this possible ?