How to Transfer Zimbra Mail? Download Zimbra Export, it is multi process you can convert all Zimbra data mails, contacts, tasks, calendars, event and etc. to multiple file format. This software has no file size limitation, you can migrate any number of Zimbra files. Zimbra Transfer Mail software is maintains all the folder structure during the conversion process. It has very simple user friendly graphical interface. This software supports all the MS Outlook editions like 2016, 2013, 2010, 2007, & 2003 and below version also. Its a Windows compatible program, which easily operates on all Windows (64bit & 32bit) editions 10, 8.1, 8, 7 & all the below editions.