This works from the command line to open .eml files: thunderbird /full/path/to/file.eml
Is "text/eml" a valid MIME Type? I imagine it must be. Could this just be added to the MIME Type field in the .desktop file?
This works from the command line to open .eml files: thunderbird /full/path/ to/file. eml
Is "text/eml" a valid MIME Type? I imagine it must be. Could this just be added to the MIME Type field in the .desktop file?