Try this Vartika Zimbra to PSTEmail Converter which is an advanced tool which can smoothly convert all the Zimbra email files in various formats and perform migration through various email clients. It is very effective and safe tool to convert all the Zimbra email files without any alteration. It enables users to open their mail files of Outlook Express in MS Outlook and PST files of MS Outlook in Outlook Express. It also supports conversion of multiple email files at a time. The software can quickly convert all the selected emails files into the user defined file format.