SOAP Message Transmission Optimization Mechanism (MTOM) is a widely used mechanism for sending attachments with SOAP. MTOM functionality is provided by the Service Management feature of the WSO2 feature repository.
Follow the instructions below to configure MTOM in your service.
1. Log on to the product's management console and select "List" under "Services."
2. The "Deployed Services" screen appears. Click on the service name for which you want to add security features. For example,
3. The "Service Dashboard" page appears with the "Quality of Service Configuration" panel. By default, MTOM is set to optional. You can set it to True or False.
You can read more information on MTOM here: http://axis.apache.org/axis2/java/core/docs/mtom-guide.html