Problem with SMTP configuration

I hope it’s ok to bump instead of creating a new topic. My host only has smtps (465/ssl) available and I can’t seem to get it to work.

  DISCOURSE_SMTP_ADDRESS: mail.myprovider.com
  DISCOURSE_SMTP_PORT: 465  # smtps/ssl
#  DISCOURSE_SMTP_PORT: 587
  DISCOURSE_SMTP_USER_NAME: login@mydomain.com
  DISCOURSE_SMTP_PASSWORD: "PASSWORD"
  DISCOURSE_SMTP_ENABLE_START_TLS: false           # (optional, default true)

These settings work in Thunderbird. Is smtps not supported or am I doing something wrong? Maybe I need to connect to mail.mydomain.com where a valid ssl cert is installed?