Unable to relay emails to external domains using MS Exchange 2016 SMTP server

I am testing email relay to external domains. I have installed KNIME application on a virtual machine.
I have setup a relay receive connector on exchange 2016 server and enable it to allow anonymous relay to external domains and added the IP of virtual machine to that receive connector. I have tested on virtual machine using telnet on port 25 to relay to external domain and it works fine. When testing with from KNIME it gives error
550 5.7.54 SMTP; Unable to relay recipients in non-accepted domain.

Hi @sharmaashish ,

Can you please make sure that your configuration of the anonymous relay is configured correctly? This looks like it is an error from the Exchange server and not the KNIME AP. Would you be able to send us your configuration in KNIME so we can see if anything is missing? Also, would you be able to send us the entire KNIME AP log for us to investigate further as well?

The log file can be found at: workspace /.metadata/knime/knime.log


1 Like

This topic was automatically closed 182 days after the last reply. New replies are no longer allowed.