=== ToSenderFolder

 Receives a Mail from the Queue and takes care to deliver the message
  to a defined folder of the sender.

You have to define the folder name of the sender.

The flag 'consume' will tell is the mail will be further

processed by the upcoming processor mailets, or not.

....
<mailet match="RecipientIsLocal" class="ToSenderFolder">
  <folder> *Sent Items* </folder>
  <consume> *false* </consume>
</mailet>
....