=== ContactExtractor

Collects the sender and the recipients of a message and store them as JSON in a
specified message attribute.

Here is the JSON format:

....
{
  "userEmail" : "sender@james.org",
  "emails" : [ "to@james.org", "cc@james.org" ]
}
....

Sample configuration:

....
<mailet match="All" class="ContactExtractor">
  <attribute>ExtractedContacts</attribute>
</mailet>
....