3197511 - Payload reaching the PI/PO Receiver Mail Adapter must be in a specific format for startTLS

• You are using the startTLS functionality in your Process Integration (PI) or Process Orchestration (PO) Receiver Mail Adapter.
• You see your email is either blank or the attachments do not come up. 
• The splitMainPayload parameter is also enabled as per SAP Note 2863754 Attachments are missing or corrupted when startTLS is enabled in Mail Receiver Adapter. 
• You may find an error similar to below in the Communication Channel Monitor:
  Transmitting the message to endpoint <local> using connection AFW failed, due to: com.sap.engine.interfaces.messaging.api.exception.MessagingException: com.sap.aii.af.sdk.xi.srt.BubbleException: Failed to call the endpoint  [null "null"]; nested exception caused by: com.sap.aii.af.sdk.xi.srt.BubbleException: Failed to call the endpoint  [null "null"]; nested exception caused by: com.sap.aii.af.sdk.xi.lang.BinaryIndexOutOfBoundsException: Binary index out of range: -1 

• SAP Netweaver 7.5.
• SAP Process Integration.

Process Integration, PI, Process Orchestration, PO, NetWeaver, XI, AEX, startTLS, email receiver, attachment, payload, no attachment, not working, missing attachment, security, Office 365, SMTP , KBA , BC-XI-CON-MAI , Mail Adapter , Problem