Converting Outlook .PST Emails to MBOX Format with Eml Viewer Pro

Are you leaving Microsoft Outlook for another email client?  Most non-Outlook clients are unable to import Outlook .pst/.ost files because the format is proprietary to Microsoft.  A workaround is to convert your Outlook .pst emails into an open email format called MBOX, or MBX.

For converting email files to different formats, EmlViewer Pro by Encryptomatic LLC (also known as PstViewer Pro) is a helpful and affordable Windows software tool.  EmlViewer Pro can read in files such as Outlook .pst, .ost, .eml, and .msg, then output the emails to different target formats, including MBOX, CSV, HTML, PDF, image files like PNG, GIF, and more.

Today’s lesson is focused on showing you how to use EmlViewer Pro to convert Outlook .pst files directly to .mbox.  MBOX is an open format that is supported by most email clients (other than Outlook) including Mozilla Thunderbird.
The first step is to open EmlViewer Pro and choose your .pst file.  Each email in the Pst file will be displayed on a line in the mail list.
Next, click on EmlViewer Pro’s “Export” menu tab, then select “MBOX from the drop down list. The partial screen shot below shows the Export menu with MBOX selected.
Screen shot of PstViewer Pro Export menu with MBOX selected.
Export Menu in EmlViewer Pro software.
Next, select the emails you want to add to the MBOX file from EmlViewer Pro’s mail list. To select all emails, type CTRL-A.  Selected emails are highlighted in blue.  You can select all emails, a range of emails, or just certain emails.
To begin the export process, click the yellow “Export” button.
EmlViewer Pro will display a status window that shows the progress of your conversion.
If you have any questions, please post them in the comments here, or use our live chat to talk with us!

MSG to EML: How to Convert Outlook Email from Outlook .MSG to .EML

There are two basic formats for storing individual email messages: .eml and .msg

The .eml open message standard was pioneered by a document called RFC-822 which set the convention for creating and formatting email messages.

Microsoft, however, decided to pursue a different path.  Outlook email messages have the file extention .msg, and are not compatible with email clients like Thunderbird that open .eml files.  Microsoft Outlook can open both .msg and .eml files.

Converting Outlook .Msg emails into .Eml files ensures that the emails are accessible in an open messaging standard, which makes email more suitable for long term storing or archiving.  There are also different situations where importing email requires conversion of email from .msg to .eml.

There are various tools on the market that can accomplish this. The two tools we will look at today are developed by Encryptomatic LLC.

MessageExport for Outlook

MessageExport is an Outlook add-in.  If you already are using Outlook, MessageExport will let you save emails directly from Outlook to .eml format, as well as PDF and many other formats.

MessageExport supports Outlook 2016/2013/2010 and 2007. After installation, it becomes part of the Outlook toolbar.   Using MessageExport is as simple as selecting one or more emails from the mail list, choosing “Export to EML” from the Outlook toolbar, and clicking on the “Export” button.

Outlook Msg to Eml with MessageExport
MessageExport saves Outlook email to EML files.

PstViewer Pro Eml Viewer

PstViewer Pro (formerly called EmlViewer Pro) is an email viewer that reads .eml, .msg, .pst, .ost and other popular email file formats.

To convert .Msg to .Eml with PstViewer Pro, first select the Windows folder containing the .msg files.  Next, highlight the .msg files in the mail list that you want to convert to to .eml
Finally, select “Export to Eml” from the drop down list and click “Export.”

PstViewer Pro will then convert the msg files into eml files. Because PstViewer Pro supports many other formats, you can mix and match between them to accomplish a wide range of email conversion tasks.

PstViewer Pro screen shots
Convert .Msg email to .Eml with PstViewer Pro’s conversion tools.

Try Either or Both, Free

PstViewer Pro and MessageExport both offer 15 day free trials from their product home pages.   If you own Outlook and are comfortable working from the Outlook GUI,  then MessageExport is likely the best choice for you   If you want to work independently of Outlook or if you do not own Outlook, then PstViewer Pro will get the job done for you.

Please post any questions below. We would love to hear what you think.