Can i running Both server Runnnig?

[farrukhndm]

I have previously installed Postfixes/dovecot/Openwebmail in Fedora box .my domian name is mail.mydomian.com with Public IP Address

on other machine i have installed zimbra Open Source 5.x with Public Ip adress and now i want to run with same domain name mail.mydomain.com ?? will it Possible to have tow host name in Same network ,??
when some will send email to username@mydomian ,weather my both servers receive emails.is it possible??

weather i nead to use proxy feature of zimbra but how???

in initially stages i want to Run my previous email server to running due to some company policy .

Please give me alternative rather than this.

thanks .

[mmorse]

Split Domain - Zimbra :: Wiki

In primary config you provision all accounts on the zimbra server as well.
In secondary config you don't have to provision every account since it's a catchall.