Nagios Support Forum

Moderator Edit: This thread has been split from another - https://support.nagios.com/forum/viewto ... =6&t=42205
In the future, please create a new thread and link to the old one instead of adding on.

Hi guys

I am also trying to setup email in Nagios XI.

But I am facing the following error-

SMTP Error: Could not authenticate.
SMTP server error: 5.5.1 Error: authentication not enabled

Here is what my config looks like with which I am getting this error-

At this point, it's hard to say *exactly* what you need to do. That said, you need to modify your SMTP setup in some way. Also, I would speak to the admin of relay01 and make sure you are using the right settings. Have you tried TLS or SSL to see if those work? Also, that username and password are for SMTP, not for something on the nagios side, so make sure those are correct.

What version of XI are you running? You can find it in the lower left-hand corner. Usually there's the option to set a debug log, which you don't have.

From the nagios server, can you attach all of the following (if you have them...it's ok if they don't all exist):