### Start with a simple text message:
$msg = MIME::Lite->new(
   From    => 'me@myhost.com',
   To      => 'you@yourhost.com',
   Cc      => 'some@other.com, some@more.com',
   Subject => 'A message with 2 parts...',
   Type    => 'TEXT',
   Data    => "Here's the GIF file you wanted",
);

### Attach a part... the make the message a multipart automatically:
$msg->attach(
   Type     => 'image/gif',
   Path     => 'aaa000123.gif',
   Filename => 'logo.gif',
);

### Send in the "best" way (the default is to use "sendmail"):
$msg->send;