add SMTP_ENABLE_TLS

config/environments/production.rb

@@ -88,6 +88,8 @@ Rails.application.configure do
       openssl_verify_mode: ENV['SMTP_SSL_VERIFY'] == 'false' ? OpenSSL::SSL::VERIFY_NONE : OpenSSL::SSL::VERIFY_PEER,
       authentication: ENV.fetch('SMTP_PASSWORD', nil).present? ? ENV.fetch('SMTP_AUTHENTICATION', 'plain') : nil,
       enable_starttls: ENV['SMTP_ENABLE_STARTTLS'] != 'false',
+      ssl: ENV['SMTP_ENABLE_SSL'] == 'true',
+      tls: ENV['SMTP_ENABLE_TLS'] == 'true',
       open_timeout: ENV.fetch('SMTP_OPEN_TIMEOUT', '15').to_i,
       read_timeout: ENV.fetch('SMTP_READ_TIMEOUT', '25').to_i
     }.compact