http://bugs.winehq.org/show_bug.cgi?id=58167
--- Comment #10 from Michael Setzer II mikes@kuentos.guam.net --- Two things. Under wine winecfg Under the graphics tabs There are a number of check boxes under windows settings. I tried the combinations, and it makes little differences, but mine still minimizes the same way as far as I can tel..
A 2nd option. I generally have XFCE setup for 4 workspaces. Rather than minimizing the Pegasus Mail, perhaps clicking on top bar, and move it to a separate workspace, then switch back and forth between the workspaces.
One thing I found was alt enter was suppose to minimize, but for me it does nothing??