Export Zimbra mailbox

To export the mailbox for user@acme.com as a zip file use this command:

/opt/zimbra/bin/zmmailbox -z -m user@acme.com getRestURL \
'//?fmt=zip&query=is:anywhere' > user_at_acme_com.zip

Here is the same as a tgz file:

/opt/zimbra/bin/zmmailbox -z -m user@domain.com getRestURL \
“//?fmt=tgz” > /tmp/account.tgz

And here's a restore of the tgz file:

/opt/zimbra/bin/zmmailbox -z -m user@domain.com postRestURL \
“//?fmt=tgz&resolve=reset” /tmp/account.tgz

Source:  http://blogs.reliablepenguin.com/index.php/2009/03/02/export-zimbra-mailbox