FluentSMTP with WP_PROXY_HOST

Hello! We are trying to install FluentSMTP to use it with Amazon SES or SMTP. When trying to send a test mail with both SES or SMTP, nothing is happening, it seems like a connection timeout is being produced (although he have no evidence of that since nothing is logged to the console or wp-debug).

As this specific WP installation works with a proxy and we have WP_PROXY_HOST configured for WordPress, I am assuming that maybe FluentSMTP is not using this configuration and tries to connect to SES/SMTP without going through the proxy (which would explain a timeout).

Any chance that FluentSMTP can be updated to make use of the WP core class WP_HTTP_Proxy for sending its mails? This is a global WP class and should hopefully be easy to implement.

If you think the issue is not caused by the proxy topic, is there any other chance we might have to debug the issue and find out why the test mails are not being sent?

Thank you very much!