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Home > Success Center > Network Performance Monitor (NPM) > NPM - Knowledgebase Articles > SMTP email test fails for Exchange Server

SMTP email test fails for Exchange Server

Updated December 15, 2016


When adding SMTP servers in the Orion Web Console settings, you are unable to send a test email to make sure that communication is established. 



All NPM versions


On the Exchange server configuration, Anonymous access is not enabled. 


  1. Run Wireshark with filter ip.addr == <IP> && tcp.port == 25.
  2. Check the packet data for authentication errors.
  3. Select Anonymous access to allow email authentication. 
  4. Check Microsoft Exchange documentation from Microsoft (© 2016 Microsoft, available at, obtained on December 14, 2016.) to locate the option based on version installed for Exchange.


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