To skip testing for the presence of a exim4 command, use the --skip-exim4 or the --exim4=/opt/exim4/exim4 command line switch.
exim4
--skip-exim4
--exim4=/opt/exim4/exim4
Alternatively, set $ENV{SKIP_EXIM4} to a true value.
$ENV{SKIP_EXIM4}
To install Test::Exim4::Routing, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Test::Exim4::Routing
CPAN shell
perl -MCPAN -e shell install Test::Exim4::Routing
For more information on module installation, please visit the detailed CPAN module installation guide.