I have a situation, where i have about 20,000 emails hosted on a server with domain mydomain.com. Out of those 20,000, there are 20 email accounts, for which i want my MX servers, to route their emails to another Postfix server, which is is latest and updated. Reason for doing this is that i have same domain name , for all of 20,000 email address. i want to keep the domain name same, but route emails of 20 unique email address to another server.
Is that possible? if yes how? May be i have to use postfix transport tables on MX servers?