List of Forbidden HeadersE-mail Server does not allow certain headers to be added to outbound e-mail. These excluded headers are listed in the file com/genesyslab/icc/emailserver/ForbiddenHeaders.properties, contained in esj.jar, which is normally located in GCTIeServices 8.1.0E-mail Server Java\lib.You can modify this list by extracting ForbiddenHeaders.properties to the directory, then editing the content. E-mail Server will then use this modified file. If there is no such file in the directory, E-mail Server uses the one in esj.jar.