# File lib/logging/appenders/email.rb, line 50
  def flush
    return self if buffer.empty?

    ### build a mail header for RFC 822
    rfc822msg =  "From: #{@from}\n"
    rfc822msg << "To: #{@to.join(",")}\n"
    rfc822msg << "Subject: #{@subject}\n"
    rfc822msg << "Date: #{Time.new.rfc822}\n"
    rfc822msg << "Message-Id: <#{"%.8f" % Time.now.to_f}@#{@domain}>\n\n"
    rfc822msg << buffer.join

    ### send email
    Net::SMTP.start(*@params) {|smtp| smtp.sendmail(rfc822msg, @from, @to)}
    self
  rescue StandardError, TimeoutError => err
    self.level = :off
    ::Logging.log_internal {'e-mail notifications have been disabled'}
    ::Logging.log_internal(-2) {err}
  ensure
    buffer.clear
  end