Alerts not being sent and I see python.log error related to "550 5.7.1 Unable to relay"

[the_wolverine]

Seeing the following error and no alerts are getting emailed although they are being triggered.

2010-08-10 14:00:34,502 ERROR {'splunk@lists.mycompany.com ': (550, '5.7.1 Unable to relay')} while sending mail to: splunk@lists.mycompany.com

What's going on? How can I fix this?

[the_wolverine · Accepted solution]

As suggested by the error, the issue is specific to a relay issue at the mail server. Typically the issue is that the mail server in question requires authentication. To bypass authentication, you might try to request that the Splunk server's IP address be added to the mail server's whitelist (if one exists.)