def send_emails
      mail = build_mail
      get_recipients do |recipient|
        unless EmailResponse.exists?(email: recipient.email) # bounces & complaints
          mail.to = recipient.email
          replace_and_send_mail_safely(mail, recipient)
        end
      end
    end
def send_emails
      mail = build_mail
      get_recipients do |recipient|
        unless EmailResponse.exists?(email: recipient.email) # bounces & complaints
          mail.to = recipient.email
          replace_and_send_mail_safely(mail, recipient)
        end
      end
    end
Iterate over recipients and sends emails