Hi Ana. Thanks for doing your research first! Sorry that the other posts haven't helped you resolve. This error generally means that you should not be using a username or password in your SMTP settings, because the server doesn't support authentication. So these two settings should be as follows:

smtp.user: null

smtp.password: null

Are you already using those settings? If so, something else that is weird is going on.

Interesting--I wonder if Tableau Server tries the credentials first, then retries with none if the server tells it that no authentication method is supported. I bet we could implement something like that in VizAlerts to help make things a bit easier in configuring.

You're welcome!

Hello,

I wanted to clarify where the changes to 'null' were made. Were they made in the SMTP settings on the 'Configure Tableau Server' menu or elsewhere? Wouldn't setting the SMTP credentials to 'null' affect subscriptions?

Thank you in advance!

Good catch--definitely do not modify your Tableau Server config! I was referring to the config\vizalerts.yaml file. You would make the change there.

By Applying this solution, my alerts are started working. Thank you so much Mr Matt Coles.