Canon/MP Navigator EX
I'm the resident computer wizard for my extended family. One setup has a Canon scanner and I ran into this problem after I converted their mail account from <gasp> Outlook Express 6.0 to Mozilla Thunderbird due to UTF-8 issues with mails.
One nice day I got a call telling me that the Scan to Mail function of the MP Navigator EX software was no longer working correctly. The Thunderbird forum in German had the solution. I went a bit further during my research and explain in more detail how it works. Hence this can be applied to any other mail client that is registering itself under registry key HKEY_LOCAL_MACHINE\SOFTWARE\Clients\Mail.
Fire up regedit.exe and navigate to the HKEY_LOCAL_MACHINE\SOFTWARE\Clients\Mail key it should look somewhat like the below.
HKEY_LOCAL_MACHINE\SOFTWARE\Clients\Mail |- Hotmail |- Mozilla Thunderbird |- Outlook Express
For our purpose we want to use Mozilla Thunderbird which is not listed in MP Navigator EX yet.
Next open explorer and navigate to %ProgramFiles%\Canon\MP Navigator EX <VersionNumber>\Device\. Edit the files <ProductName>.ini and <ProductName>n.ini. Where the ProductName is mg6200 for a Canon PIXMA MG6200.
Change the [Application] section from this:
[Application] Mailer0=Outlook Express Mailer1=Microsoft Outlook Mailer2=Windows Mail Mailer3=Windows Live Mail
To the below
[Application] Mailer0=Mozilla Thunderbird Mailer1=Microsoft Outlook Mailer2=Windows Mail Mailer3=Windows Live Mail ;Mailer4=Outlook Express
After that change only Mozilla Thunderbird will show up in the pull-down menu.