I use MIME::Lite frequently with no trouble. Do you set the send address?

use strict;
use warnings FATAL => 'all';
use MIME::Lite;

my $toAddress = 'to@address.here';
my $fromAddress = 'from@address.here';
my $ccAddr;
my $buildPath;
my $options = "";

my $msg = MIME::Lite->new
  (
  From    => $fromAddress,
  To      => $toAddress,
  Subject => "build $buildPath",
  Data    => "build $buildPath $options"
  );

$msg->Add (Cc => $ccAddr) if $ccAddr;
MIME::Lite->send ("smtp", "smtp.of.your.ma");
$msg->send;
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