mailtextbody 0.1.3-2build2 (ppc64el binary) in ubuntu bionic

 Mailtextbody reads a complete email message on stdin and returns the body
 on stdout. Technically speaking, it returns the first decoded text/plain
 MIME part of any (however nested) MIME message or just the body of a
 non-MIME message otherwise.
 .
 Mailtextbody can easily be included in other tools using pipes.