(Debian package: libmail-box-perl)
- Mail::Header <https://metacpan.org/pod/Mail::Header>
(Debian package: libmailtools-perl)
-- String::ShellQuote <https://metacpan.org/pod/String::ShellQuote>
- (Debian package: libstring-shellquote-perl)
- Term::ReadLine::Gnu <https://metacpan.org/pod/Term::ReadLine::Gnu>
(Debian package: libterm-readline-gnu-perl)