If you find this error as you run Apache Axis in Java version - Unable to find required classes (javax.activation.DataHandler and ja nternet.MimeMultipart). Attachment support is disabled. The solution is to copy mail.jar and activation.jar in directory ..jre1.5.xlibext but if you use jdk1.5.x as your JAVA_HOME, copy those *.jar files in directory ..jdk1.5.xjrelibext