AS4 Mailbox: HTTP Tab
The mailbox's HTTP tab allows you to assign a Content-Type for the documents to be transferred.
It is recommended that you set this type according to the payload type. If the payload type
is unknown, a content-type setting of application/octet-stream is
recommended as it generally represents all types of data. If this optional parameter is not
specified, then a default is determined based on whether SOAP with Attachments (SwA)
packaging (application/octet-stream) or <Body>
payload (text/xml) is being used.