module Sisimai::Lhost::OpenSMTPD

Sisimai::Lhost::OpenSMTPD parses a bounce email which created by OpenSMTPD. Methods in the module are called from only Sisimai::Message.

Constants

Indicators
MessagesOf
ReBackbone
StartingOf

Public Class Methods

description() click to toggle source
# File lib/sisimai/lhost/opensmtpd.rb, line 133
def description; return 'OpenSMTPD'; end
make(mhead, mbody) click to toggle source

Parse bounce messages from OpenSMTPD @param [Hash] mhead Message headers of a bounce email @param [String] mbody Message body of a bounce email @return [Hash] Bounce data list and message/rfc822 part @return [Nil] it failed to parse or the arguments are missing

# File lib/sisimai/lhost/opensmtpd.rb, line 73
def make(mhead, mbody)
  return nil unless mhead['subject'].start_with?('Delivery status notification')
  return nil unless mhead['from'].start_with?('Mailer Daemon <')
  return nil unless mhead['received'].any? { |a| a.include?(' (OpenSMTPD) with ') }

  dscontents = [Sisimai::Lhost.DELIVERYSTATUS]
  emailsteak = Sisimai::RFC5322.fillet(mbody, ReBackbone)
  bodyslices = emailsteak[0].split("\n")
  readcursor = 0      # (Integer) Points the current cursor position
  recipients = 0      # (Integer) The number of 'Final-Recipient' header
  v = nil

  while e = bodyslices.shift do
    # Read error messages and delivery status lines from the head of the email
    # to the previous line of the beginning of the original message.
    if readcursor == 0
      # Beginning of the bounce message or delivery status part
      readcursor |= Indicators[:deliverystatus] if e.start_with?(StartingOf[:message][0])
      next
    end
    next if (readcursor & Indicators[:deliverystatus]) == 0
    next if e.empty?

    #    Hi!
    #
    #    This is the MAILER-DAEMON, please DO NOT REPLY to this e-mail.
    #
    #    An error has occurred while attempting to deliver a message for
    #    the following list of recipients:
    #
    # kijitora@example.jp: 550 5.2.2 <kijitora@example>... Mailbox Full
    #
    #    Below is a copy of the original message:
    v = dscontents[-1]

    if cv = e.match(/\A([^ ]+?[@][^ ]+?):?[ ](.+)\z/)
      # kijitora@example.jp: 550 5.2.2 <kijitora@example>... Mailbox Full
      if v['recipient']
        # There are multiple recipient addresses in the message body.
        dscontents << Sisimai::Lhost.DELIVERYSTATUS
        v = dscontents[-1]
      end
      v['recipient'] = cv[1]
      v['diagnosis'] = cv[2]
      recipients += 1
    end
  end
  return nil unless recipients > 0

  dscontents.each do |e|
    e['diagnosis'] = Sisimai::String.sweep(e['diagnosis'])
    MessagesOf.each_key do |r|
      # Verify each regular expression of session errors
      next unless MessagesOf[r].any? { |a| e['diagnosis'].include?(a) }
      e['reason'] = r
      break
    end
  end
  return { 'ds' => dscontents, 'rfc822' => emailsteak[1] }
end