I attach a little sopaui project that generate a SOAP request with MTOM attachment. The endpoint adopt the basic preemptive authorization. I have a bash script test_mtom that try to MAKE AN IDENTICAL AN WORKING SOAP request, but [login to view URL] goal is to find someone that can make the test_mtom working. Attached files
[login to view URL] soapui log of a failed request caused by missing "preemptive_authorization"
[login to view URL] soapui log of a OK request
test_mtom the script that generates my request
[login to view URL] the request attachment
[login to view URL] the envelop used by test_mtom to create the request