Did you try like the Doc said?

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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I agree with jeffa mime::lite is good!

Okay my execuse is being sick and drugged up. Not a good combo for problem solving. Thanks for spotting that iguaanodon