Changing Windows Live Messenger 2009’s Hotmail button to use Internet Explorer instead of the default browser
Prior to Windows Live Messenger 2009, when you clicked the Mail button in Messenger, Internet Explorer would automatically pop up and log you into Hotmail regardless of your default browser. Beginning with Windows Live Messenger 2009, clicking the Mail button will open Hotmail in your default browser and if that is not Internet Explorer, it will not provide the automatic log-on into Hotmail*.
So, I created Hotmail in IE, which will set allow you to continue to use your default browser in Windows and other applications (including links in Messenger conversations), but use Internet Explorer for Messenger’s Hotmail features.
How to use
Hotmail in IE does not require installation. Just download the executable and run it directly. You will be shown the following:
To set Internet Explorer to open when you click the Mail button in Messenger, choose the Internet Explorer button. Should you wish to set it back, choose Default Web Browser. Once you have made your choice, choose Done and no further changes should be needed.
The next time you start your normal default browser, you may receive a prompt regarding its default status. Choose No to this prompt and elect to not receive these notifications to avoid needing to set the mail button handler again.
Windows XP, Windows Vista, or Windows 7
Both 32-bit or 64-bit supported
A Windows Live ID that supports Hotmail (such as @live.com, @hotmail.com, etc.)
Hotmail in IE is written in Visual C++ 2008
6/8/2009 1.0 Initial Release
* The official reasoning for the inability of Messenger to log-in you in automatically is for security reasons. Messenger has no direct secure route to sign you into Windows Live ID in other browsers as it does with Internet Explorer.