Watcher- cannot update mail settings

hello,
can you please assist with the following error?
I'm trying to configure smtp in order to use watcher

Currently the only way you can use watcher email in ESS is by using our built-in SMTP proxy (for spam prevention, sadly)

https://www.elastic.co/guide/en/cloud/current/ec-watcher.html

so I don't need to define mail settings in the deployment's User Settings at all?

I mean: will that work just as is? (after verifying the email address of course)

image

so I don't need to define mail settings in the deployment's User Settings at all?

Correct - and the JSON snippet you posted looks about right

Thanks a lot