Hi, believe many of you already know this feature, I discovered it myself and find somehow useful to be shared here.
There's a way to open a Seamonkey email instance window directly like a standalone email client with no need to begin from the browser window.
Running the command
seamonkey -mail
from inside the seamonkey working directory will do the job.
At this point I can set a .cmd script file containing such command to be executed with a mouse doubleclick.
And, of course, creating its shadow copy on the desktop and choosing the proper icon for it, will provide an immediate application handling, separating email from the browser one, both available when wanted.