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Tip 725: Open *.EML in Outlook

mrbinky3000 gets credit for the following reghack.

This reghack will allow you to open *.eml attachments (OE/Mail/Live mail messages) in Outlook’s message form (if you want to reply to the message, use Alt+S to send if the send button is missing).

Warning: before editing the registry you should export the keys you are planning to edit and if you start having problems with Outlook, restore the keys. That said, I haven’t had any problems with this hack.

If you have Live Mail installed, go to
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Microsoft Internet Mail Message WLMail\shell\open\command

If Outlook express, go to:
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Microsoft Internet Mail Message\shell\open\command

Change the key to the following line, exactly as shown below,  except you’ll use the correct path for your version of Outlook:

Ie, Outlook 2007 on 64x Vista or Windows is
“C:\Program Files (x86)\Microsoft Office\Office12\OUTLOOK.EXE” /eml “%1″

Outlook 2003 on 32bit Windows
“C:\Program Files\Microsoft Office\Office11\OUTLOOK.EXE” /eml “%1″

For years, I changed the association for eml (and nws) to notepad so email attachments or files on my hard drive would open outside of OE. (Before that, I changed the file extension to txt or html.) The advantage of using this method is the headers are hidden; the disadvantage is Outlook needs to be open.

Complete instructions and screenshots:
Open .eml Files in Outlook


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