SAP Knowledge Base Article - Preview

3378246 - Connectivity Issue with SMTP Adapter using STARTTLS

Symptom

When testing the connectivity from Cloud Integration tenant to an SMTP mail server, the connectivity is failing with one of the following errors:

  • Cloud Based SMTP Server
    com.sun.mail.util.MailConnectException: Couldn't connect to host, port: XXX.XXX.XX.XXX, <PORT>; timeout 15000 Cause: java.net.ConnectException: error 111 - Connection refused (Connection refused)

  • On-Premise SMTP Server
    com.sun.mail.util.MailConnectException: Couldn't connect to host, port: XX.XXX.XX.XX, <PORT>; timeout 15000 Cause: java.net.SocketException: SOCKS5 command failed with status: FORBIDDEN

The following configurations are also in place:

  • STARTTLS is being used
  • Connection to the IP Address of the mail server is being used


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Environment

  • SAP Cloud Integration
  • SAP Integration Suite
  • SAP Business Technology Platform

Product

Cloud Integration all versions ; SAP Integration Suite all versions

Keywords

CPI, HCI. SCPI, Integration Suite, Cloud Integration, Mail Server, SMTP server, SMTP adapter, Mail Adapter, connectivity test, com.sun.mail.util.MailConnectException: Couldn't connect to host, port:, java.net.ConnectException: error 111 - Connection refused, java.net.SocketException: SOCKS5 command failed with status: FORBIDDEN, IP address , KBA , LOD-HCI-PI-CON-SOAP , SOAP Adapter , Problem

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