Send an email throw exception. No object DCH for MIME type text/plain; Charset=utf-8

The exception that is thrown when the message is sent:

IOException while sending message; Nested exception Is:javax.activation.UnsupportedDataTypeException:no object DCH for MIME type text/plain; Charset=utf-8

Check the Lib folder in the site and in the Tomcat common Lib below is not at the same time Mail.jar and Activation.jar, no words add in OK, I have resolved. Jar Package I have uploaded, use the words myself under.

http://download.csdn.net/detail/m_123hj_520/8505847

Send an email throw exception. No object DCH for MIME type text/plain; Charset=utf-8