Allow to set CA file for SMTP (#2713)

.env.production.sample

@@ -46,6 +46,7 @@ SMTP_FROM_ADDRESS=notifications@example.com
 #SMTP_DOMAIN= # defaults to LOCAL_DOMAIN
 #SMTP_DELIVERY_METHOD=smtp # delivery method can also be sendmail
 #SMTP_AUTH_METHOD=plain
+#SMTP_CA_FILE=/etc/ssl/certs/ca-certificates.crt
 #SMTP_OPENSSL_VERIFY_MODE=peer
 #SMTP_ENABLE_STARTTLS_AUTO=true
 

config/environments/production.rb

@@ -99,6 +99,7 @@ Rails.application.configure do
     :password             => ENV['SMTP_PASSWORD'].presence,
     :domain               => ENV['SMTP_DOMAIN'] || ENV['LOCAL_DOMAIN'],
     :authentication       => ENV['SMTP_AUTH_METHOD'] == 'none' ? nil : ENV['SMTP_AUTH_METHOD'] || :plain,
+    :ca_file              => ENV['SMTP_CA_FILE'].presence,
     :openssl_verify_mode  => ENV['SMTP_OPENSSL_VERIFY_MODE'],
     :enable_starttls_auto => ENV['SMTP_ENABLE_STARTTLS_AUTO'] || true,
   }