Hi,
I could not find a page/pointer where this is described. I managed to pick up the command line somewhere, so here I like to share for the record how I am able to start Outlook from Firefox. This should also work for Mozilla, and Chrome I guess. If there is a better way, I love to hear it too.
So: How to start an Outlook E-mail message, after clicking a mailto: link in your web browser (Firefox, Mozilla, Chrome) on Linux, or simply from the command line. [Tested on Ubuntu/64 10.04, with Firefox 3.6.3, Crossover Linux Standard 9.0.1, Office 2007 (SP2)]
Unfortunatly Firefox did not understand the whole command line entered as a type location. So I therefor created a batch file (let's call it "start-outlook-from-crossover.sh"), made it executable (chmod gou+x <file>). It contains:
#!/bin/sh
/opt/cxoffice/bin/wine \
--bottle "Microsoft Office 2007" \
"C:\\\\PROG~FBU\\\\MICR~HFZ\\\\Office12\\\\OUTLOOK.EXE" \
-c IPM.Note /m "$1"
Then, when Firefox asked which Application to Launch (Yahoo, Gmail) when clicking a mailto: link, I choose 'Choose an Application' and pointed to the newly baked batch file.
Now Outlook starts a new e-mail, with the To field filled in.
Off you go...!