See this. I suspect it's installed by default on Ubuntu. https://manpages.ubuntu.com/manpages/xenial/man1/run-mailcap.1.html https://manpages.ubuntu.com/manpag

See this. I suspect it's installed by default on Ubuntu. https://manpages.ubuntu.com/manpages/xenial/man1/run-mailcap.1.html https://manpages.ubuntu.com/manpages/xenial/man1/run-mailcap...