SAP Knowledge Base Article - Preview

1950670 - Error XS856 "No delivery to &1, authentication required" occurs while sending mails through SMTP node

Symptom

While sending mails from an SAP system through SMTP node, following error occurs in transaction SOST:

No delivery to &1, authentication required
XS856

XS856_SOST_1.png

In the long text of the message additional information might be displayed:

530 5.7.1 Client was not authenticated

XS856_long_text_1.png


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Environment

  • SAP Basis Release 731 and higher
  • SMTP interface

Product

SAP NetWeaver all versions

Keywords

Keine Auslieferung an, Authentifizierung erforderlich, authentication procedure, SMTP PlugInHandleNetData, NTLM#, GSSAPI NTLM LOGIN, LOGIN#, PLAIN, EXTERNAL , KBA , xs 853 , xs853 , xs 856 , BC-SRV-COM , Communication Services: Mail, Fax, SMS, Telephony , BC-SRV-COM-INT , Internet Mail Gateway , Problem

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