3129310 - XS844 - security requirement not fulfilled

• Emails/Faxes are failing with "XS844 - security requirement not fulfilled" in SOST
• Long text of the XS844 error from SOST shows:
  
  No delivery to * as security conditions are not fulfilled - Message no. XS844
  
  Diagnosis: The message was processed correctly in the SAP system. However, a subsequent system registers that the message cannot currently be delivered to the receiver * due to security conditions. It is possible that they message could not be decrypted or verified, or a necessary authentication could not be executed.
  
  Information from external system (if available)
  
  5.7.1 failed
  
  (Authorization error occurred)
  
  
• Screenshot of the error from SOST:
  
  
  
  "Image/data in this KBA is from SAP internal systems, sample data, or demo systems. Any resemblance to real data is purely coincidental."
  

SAP Basis release independent

xs844, 5.7.1 failed, security conditions, not fulfilled, SOST, mail server , KBA , BC-SRV-COM , Communication Services: Mail, Fax, SMS, Telephony , Problem