to open an eml-file is still "unsupported" by SeaMonkey. I have now installed Mozilla ThunderBird also and have make it to the default. Now doppel-klick
an eml-file opens the file in the ThunderBird Compose-Window. Also downloading the eml-file from any Brower opens the ThunderBird-Compose-Window
(content-type: application/eml). May be some one can port this ThunderBird-Code also to SeaMonkey? ThunderBird and SeaMonkey are both from the Mozilla-Foundation, isn't it?
Regards, Frank