Graylog Email transport Gmail SMTP Setting

[drx1984]

good day,
I would like to set up an email notification in graylog.
My configuration looks like this:

# Email transport
transport_email_enabled = true
transport_email_protocol = smtp
transport_email_hostname = smtp.gmail.com
transport_email_port = 587
transport_email_use_auth = true
transport_email_use_tls = true
transport_email_use_ssl = false
transport_email_auth_username = alert.graylog@gmail.com
transport_email_auth_password = password
transport_email_from_email = alert.graylog@gmail.com
transport_email_subject_prefix = [graylog]
transport_email_socket_connection_timeout = 10s
transport_email_socket_timeout = 10s

But when I send a test email I always get the message: Sending the email to the following server failed "smtp.gmail.com:587.

What am I doing wrong? Or what else do I need to set up?

Thanks

[drewmiranda-gl (Drew Miranda)]

Can you check your graylog server.log commonly /var/log/graylog-server/server.log
or if you are using docker docker logs <container_name> ?

I’m assuming you are using an app password as well? Sign in with app passwords - Gmail Help

[drx1984]

So Graylog is not running in Docker for me. I don’t see any indication of this error in the log.
but in Graylog I see the message as in the screenshot:

I’m sure I entered my access data correctly.
What else could it be? Are my parameters correct?

[drewmiranda-gl (Drew Miranda)]

What does the google page say that is returned in the error? It seems to be indicating failed authentication: “Bad Credentials…”