This command line converts .eml to .epub file.
> go get github.com/gonejack/email-to-epub
> email-to-epub *.eml
Flags:
-h, --help Show context-sensitive help.
--cover=STRING Set epub cover image.
--title="HTML" Set epub title.
--author="HTML to Epub" Set epub author.
-o, --output="output.epub" Output filename.
-v, --verbose Verbose printing.
--about About.