Error to send test email fron kibana connector

Hello, friends of the community, I am facing a problem when configuring the sending of email through connector, when I perform a test I get the following error:

Action failed to run
The following error was found:
error sending email
Details:
140111650948992:error:1408F10B:SSL routines:ssl3_get_record:wrong version number:../deps/openssl/openssl/ssl/record/ssl3_record.c:332:

Anyone have any idea what's going on?

Greetings

I believe that error message means somewhere in the flow of information between Kibana and the email server, there is a request with an HTTPS URI, but the actual endpoint doesn't use encryption. The URI should be HTTP.

Without sharing any confidential information, could you share your kibana.yml?