Merge two accounts located on 2 different cpanel servers

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http://forums.cpanel.net – Good day all, one of my cpanel servers crashed. in the process of recovering i set up a domain located on the crashed server on my second cpanel server to cushion mail flow disruption with same number of email accounts but different passwords. But now my crashed server is back up and i would like to transfer mail on the temporary cpanel server to the original one. is this possible? if i copy the /home/domain/mail/ directory from the temporary-fix-server to the /home/domain/mail/ directory of the original server will i lose the data that is on the original server? how best can i go about thi (HowTos)