OK, maybe I'm looking at the wrong module, but when I checked out Email::Send, I got this information:

use Email::Send;
send Sendmail => $message;
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Otherwise, the information for Mail::Sendmail gives me:

use Mail::Sendmail;

  %mail = ( To      => 'you@there.com',
            From    => 'me@here.com',
            Message => "This is a very short message"
           );

  sendmail(%mail) or die $Mail::Sendmail::error;

  print "OK. Log says:\n", $Mail::Sendmail::log;
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It seems to me that there must be some sort of "send" instruction.

If you're not using any modules, then perhaps you need to configure sendmail. And if you're not using a module, perhaps doing so would make your life easier.