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I have Outlook open. In Firefox, I click a mailto: link. Instead of opening a new message, it opens up a new instance of Outlook, which doesn't work.

My problem is basically exactly as described in KB312346

Unfortunately, the solution presented is not for Windows 7 and I can't figure out how to add the -c IPM.Note /m "%1" part of the application string.

In the Tools > Options menu, I have mailto: set to use Outlook, but in the application details, it lists just C:\Program Files (x86)\Microsoft Office\OFFICE11\OUTLOOK.EXE. How do I add the extra settings to that?

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You are sure that the mailto link is correct rawurlencode?

I had the same problem. After hours of search. I found out that the mailto link(s) was not encodet.

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Please update this answer with the actual change (from the link?) that needs to be done for a new Outlook message Window to open. – Lizz Jan 17 '13 at 15:53
While I'm not sure if it is properly encoded or not, I do know that the mailto: link works properly using other browsers and on other computers. It is not just one mailto: link, but every mailto: link I click on. – David Robison Jan 17 '13 at 19:32

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