Topic: need advice on iredmail deployment
here the scenario, 1 iredmail server in HQ, 1 iredmail server in branch A, one email domain (xxx.yyy).
for example, both HQ and branch have total 5 email users, user A, user B, user C, user D and user E.
iredmail server in HQ contain all 5 users account, iredmail server in branch A contain 2 users account (user D and user E).
any email to xxx.yyy will go to iredmail HQ and iredmail branch A will pull user D and user E's emails from iredmail HQ.
user D and E will use iredmail branch A as relay and user A, B and C will use iredmail HQ as relay.
so, user D and user E will get email sent by user A, user B and user C cause all 5 users account in iredmail HQ.
user D and E can sent email to each others cause they account is in branch A iredmail but how about user D and E send email to user A, B and C, the server should reject them with unknown recipient due to iredmail branch A can't find user A, B and C, am i right?
in this case, how should i deploy the iredmail? can i configure: other users than D and E with same domain direct send to iredmail HQ? using postfix transport?
thanks for help.