Module: Sisimai::Lhost::TrendMicro

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

Overview

Sisimai::Lhost::TrendMicro decodes a bounce email which created by TREND VISION ONE: Email and Collaboration Security: www.trendmicro.com/en_us/business/products/email-and-collaboration.html Methods in the module are called from only Sisimai::Message.

Constant Summary collapse

Boundaries = 
['Content-Type: message/rfc822'].freeze

Class Method Summary collapse

Class Method Details

.description ⇒ Object 



80
 
# File 'lib/sisimai/lhost/trendmicro.rb', line 80

def description; return 'TREND VISION ONE(Email and Collaboration Security)'; end

.inquire(mhead, mbody) ⇒ Hash, Nil

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/trendmicro.rb', line 15

def inquire(mhead, mbody)
  # :received => %r/[ ][(]InterScanMSS[)][ ]with[ ]/,
  match = 0
  tryto = [
    'Mail could not be delivered',
    'メッセージを配信できません。',
    'メール配信に失敗しました',
  ]
  match += 1 if mhead['from'].start_with?('"InterScan MSS"')
  match += 1 if mhead['from'].start_with?('"InterScan Notification"')
  match += 1 if tryto.any? { |a| mhead['subject'] == a }
  return nil if match == 0

  require 'sisimai/smtp/command'
  dscontents = [Sisimai::Lhost.DELIVERYSTATUS]; v = nil
  emailparts = Sisimai::RFC5322.part(mbody, Boundaries)
  bodyslices = emailparts[0].split("\n")
  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.
    next if e.empty?

    v  = dscontents[-1]
    p1 = e.index(' <<< ') || -1 # Sent <<< ...
    p2 = e.index(' >>> ') || -1 # Received >>> ...
    if e.include?('@') && e.include?(' <') && ( p1 > 1 || p2 > 1 || e.include?('Unable to deliver ') )
      # Sent <<< RCPT TO:<kijitora@example.co.jp>
      # Received >>> 550 5.1.1 <kijitora@example.co.jp>... user unknown
      # Unable to deliver message to <kijitora@neko.example.jp>
      cr = e[e.rindex('<') + 1, e.rindex('>') - e.rindex('<') - 1]

      if v["recipient"] != "" && cr != v['recipient']
        # There are multiple recipient addresses in the message body.
        dscontents << Sisimai::Lhost.DELIVERYSTATUS
        v = dscontents[-1]
      end
      v['recipient'] = cr
      v['diagnosis'] = e if e.include?('Unable to deliver ')
      recipients = dscontents.size
    end

    case
    when e.start_with?('Sent <<< ')
      # Sent <<< RCPT TO:<kijitora@example.co.jp>
      v['command'] = Sisimai::SMTP::Command.find(e)

    when e.start_with?('Received >>> ')
      # Received >>> 550 5.1.1 <kijitora@example.co.jp>... user unknown
      v['diagnosis'] = e[e.index(' >>> ') + 4, e.size]
    else
      # Error message in non-English
      v['command'] = Sisimai::SMTP::Command.find(e) if e.include?(' >>> ')
      p3 = e.index(' <<< '); next if p3.nil?
      v['diagnosis'] = e[p3 + 4, e.size]
    end
  end
  return nil if recipients == 0

  dscontents.each do |e|
    e['reason'] = 'userunknown' if e['diagnosis'].include?('Unable to deliver')
  end
  return { 'ds' => dscontents, 'rfc822' => emailparts[1] }
end