why is authentication: 'plain' the default setting for actionmailer in rails (with gmail smtp)?
问题 I am reading up on actionmailer for rails. My question is about the default settings as described here: config.action_mailer.delivery_method = :smtp config.action_mailer.smtp_settings = { :address => "smtp.gmail.com", :port => 587, :domain => 'baci.lindsaar.net', :user_name => '<username>', :password => '<password>', :authentication => 'plain', :enable_starttls_auto => true } now reading from the API here it says that: ":authentication - If your mail server requires authentication, you need