Output Headers
Incoming messages may have custom headers. The Output Headers tab allows you to define a custom schema for the headers of the incoming mail messages. You can specify any standard header supported by the javax.mail
package. For example, X-Mailer or X-Priority. Values of headers in the incoming message populates the corresponding output headers of the same name that you have defined.
For a complete description of using the Output Headers tab, see Specifying Data Schema.