Module: Sisimai::Lhost::EinsUndEins

Defined in:
lib/sisimai/lhost/einsundeins.rb

Overview

Sisimai::Lhost::EinsUndEins decodes a bounce email which created by 1&1 www.1und1.de/. Methods in the module are called from only Sisimai::Message.

Constant Summary collapse

Indicators = 
Sisimai::Lhost.INDICATORS
Boundaries = 
['--- The header of the original message is following. ---'].freeze
StartingOf = 
{
  message: ['This message was created automatically by mail delivery software'],
  error:   ['For the following reason:'],
}.freeze

Class Method Summary collapse

Class Method Details

.description ⇒ Object 



104
 
# File 'lib/sisimai/lhost/einsundeins.rb', line 104

def description; return '1&1: https://www.1und1.de'; end

.inquire(mhead, mbody) ⇒ Hash, Nil

This method is abstract.

Decode the bounce message from 1&1

Parameters:

  • mhead (Hash) —

    Message headers of a bounce email

  • mbody (String) —

    Message body of a bounce email

Returns:

  • (Hash) —

    Bounce data list and message/rfc822 part

  • (Nil) —

    it failed to decode or the arguments are missing



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# File 'lib/sisimai/lhost/einsundeins.rb', line 20

def inquire(mhead, mbody)
  return nil if mhead['from'].start_with?('"Mail Delivery System"') == false
  return nil if mhead['subject'] != 'Mail delivery failed: returning message to sender'

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

  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 || e.empty?

    # The following address failed:
    #
    # general@example.eu
    #
    # For the following reason:
    #
    # Mail size limit exceeded. For explanation visit
    # http://postmaster.1and1.com/en/error-messages?ip=%1s
    v = dscontents[-1]

    if cv = e.match(/\A\s*([^ ]+[@][^ ]+?)[:]?\z/)
      # general@example.eu OR
      # the line begin with 4 space characters, end with ":" like "    neko@example.eu:"
      if v["recipient"] != ""
        # There are multiple recipient addresses in the message body.
        dscontents << Sisimai::Lhost.DELIVERYSTATUS
        v = dscontents[-1]
      end
      v['recipient'] = Sisimai::Address.s3s4(e)
      recipients += 1

    elsif e.start_with?(StartingOf[:error][0])
      # For the following reason:
      v['diagnosis'] = e
    else
      if v['diagnosis']
        # Get error message and append error message strings
        v['diagnosis'] += " #{e}"
      else
        # OR the following format:
        #   neko@example.fr:
        #   SMTP error from remote server for TEXT command, host: ...
        v['alterrors'] ||= ''
        v['alterrors']  += " #{e}"
      end
    end
  end
  return nil if recipients == 0

  require 'sisimai/smtp/command'
  dscontents.each do |e|
    e['diagnosis'] = e['alterrors'] if e['diagnosis'].empty?
    e['command']   = Sisimai::SMTP::Command.find(e['diagnosis'])

    if Sisimai::String.aligned(e['diagnosis'], ['host: ', ' reason:'])
      # SMTP error from remote server for TEXT command,
      #   host: smtp-in.orange.fr (193.252.22.65)
      #   reason: 550 5.2.0 Mail rejete. Mail rejected. ofr_506 [506]
      p1 = e['diagnosis'].index('host: ')
      p2 = e['diagnosis'].index(' reason:')

      e['rhost']   = e['diagnosis'][p1 + 6, p2 - p1 - 6]
      e['command'] = 'DATA' if e['diagnosis'].include?('for TEXT command')
      e['spec']    = 'SMTP' if e['diagnosis'].include?('SMTP error')
      e['status']  = Sisimai::SMTP::Status.find(e['diagnosis'])
    else
      # For the following reason:
      e['diagnosis'][0, StartingOf[:error][0].size] = ''
    end
  end

  return {"ds" => dscontents, "rfc822" => emailparts[1]}
end