feat: Add smtp timeout options (#9613)

- Added two Actionmailer's option (open_timeout & read_timeout) to environment variables.

.env.example

@@ -85,6 +85,8 @@ SMTP_OPENSSL_VERIFY_MODE=peer
 # Comment out the following environment variables if required by your SMTP server
 # SMTP_TLS=
 # SMTP_SSL=
+# SMTP_OPEN_TIMEOUT
+# SMTP_READ_TIMEOUT
 
 # Mail Incoming
 # This is the domain set for the reply emails when conversation continuity is enabled

config/initializers/mailer.rb

@@ -24,6 +24,8 @@ Rails.application.configure do
   smtp_settings[:openssl_verify_mode] = ENV['SMTP_OPENSSL_VERIFY_MODE'] if ENV['SMTP_OPENSSL_VERIFY_MODE'].present?
   smtp_settings[:ssl] = ActiveModel::Type::Boolean.new.cast(ENV.fetch('SMTP_SSL', true)) if ENV['SMTP_SSL']
   smtp_settings[:tls] = ActiveModel::Type::Boolean.new.cast(ENV.fetch('SMTP_TLS', true)) if ENV['SMTP_TLS']
+  smtp_settings[:open_timeout] = ENV['SMTP_OPEN_TIMEOUT'].to_i if ENV['SMTP_OPEN_TIMEOUT'].present?
+  smtp_settings[:read_timeout] = ENV['SMTP_READ_TIMEOUT'].to_i if ENV['SMTP_READ_TIMEOUT'].present?
 
   config.action_mailer.delivery_method = :smtp unless Rails.env.test?
   config.action_mailer.smtp_settings = smtp_settings