SAP Knowledge Base Article - Preview

3639007 - POP3 Connection Error in SAP PI/PO Mail Adapter: Invalid POP Status Response and Null Server Reply

Symptom

  • An error is displayed in the email communication channel.
  • The error message is similar to: "exception caught during processing mail message; java.io.IOException: invalid POP status response; not finding +OK".
  • The issue persists even after cleaning the email box and restarting the channel.


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Environment

  • SAP NetWeaver
  • SAP Process Integration

Product

SAP NetWeaver all versions ; SAP Process Integration all versions

Keywords

POP3 error, SAP PI error, mail adapter issue, email channel error, POP3 invalid response, java.io.IOException POP3, SAP PI mail error, null response POP3, firewall blocking POP3, DPI interference email, POP3 communication blocked, SAP PO email connection issue, POP3 +OK missing, antivirus blocks email adapter, SAP PI mail adapter POP3 error, troubleshoot SAP PI POP3 mail issue, SAP PI firewall POP3 null response, SAP PI email gateway issue, SAP PO mail channel java.io.IOException, SAP PI/PO POP3 adapter troubleshooting; , KBA , BC-XI-CON-MAI , Mail Adapter , Problem

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