The digital forensics investigator has to face different email clients and email formats in their day to day life hence to make things convenient we are listing some of free software that will aid in email forensic investigation.
Window Live mail uses eml format to stored emails locally though this is not the only application that uses this format in fact any email client that is designed as per RFC 5322 (eml standard) will produce an eml file.
Applicable for Microsoft Outlook Express Novell GroupWise Lotus notes Windows Mail Mozilla Thunderbird Postbox
If you have dbx format which is of Outlook Express origin then you can use the tool to view email, head information as well as attachments.
Applicable for MS Outlook Express
Many organizations connect their Zimbra Server with the Outlook email client using the Zimbra Add-on and this creates a zdb file which holds all the information. You can use the application to view all the information that resides in it including the email head information.
Applicable for Outlook Email Client