Added guess routine for not parseable (not RfC conform) email headers like "To: Max Kohl | [example.com] <kohl@example.com>".

app/models/channel/filter/identify_sender.rb

@@ -44,6 +44,7 @@ module Channel::Filter::IdentifySender
   def self.create_recipients(mail)
     ['raw-to', 'raw-cc'].each { |item|
       next if !mail[item.to_sym]
+      begin
         next if !mail[item.to_sym].addrs
         items = mail[item.to_sym].addrs
         items.each {|address_data|
@@ -53,6 +54,30 @@ module Channel::Filter::IdentifySender
             email: address_data.address,
           )
         }
+      rescue => e
+        # parse not parseable fields by mail gem like
+        #  - Max Kohl | [example.com] <kohl@example.com>
+        Rails.logger.error 'ERROR: ' + e.inspect
+        Rails.logger.error 'ERROR: try it by my self'
+        recipients = mail[item.to_sym].to_s.split(',')
+        recipients.each {|recipient|
+          address = nil
+          display_name = nil
+          if recipient =~ /<(.+?)>/
+            address = $1
+          end
+          if recipient =~ /^(.+?)<(.+?)>/
+            display_name = ($1).strip
+          end
+          next if address.empty?
+          user_create(
+            firstname: display_name,
+            lastname: '',
+            email: address,
+          )
+        }
+      end
+
     }
   end
 

test/fixtures/mail37.box

@@ -0,0 +1,13 @@
+To: Max Kohl | [example.com] <kohl@example.com>
+Cc: Ingo Best <iw@example.com>
+From: Example <info@example.com>
+Subject: Example: Java 8 Neuerungen
+Message-ID: <566694F5.2070300@example.com>
+Date: Tue, 8 Dec 2015 09:29:41 +0100
+User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101
+ Thunderbird/38.3.0
+MIME-Version: 1.0
+Content-Type: text/plain; charset=utf-8; format=flowed
+Content-Transfer-Encoding: 8bit
+
+Tag Max / Ingo!

test/unit/email_parser_test.rb

@@ -720,6 +720,19 @@ Um noch vertrauter zu werden, kannst Du mit einen externen E-Mail Account (z. B.
 [1] http://web.de',
         },
       },
+      {
+        data: IO.binread('test/fixtures/mail37.box'),
+        body_md5: 'dd67e5037a740c053c2bf91f67be072f',
+        params: {
+          from: 'Example <info@example.com>',
+          from_email: 'info@example.com',
+          from_display_name: 'Example',
+          subject: 'Example: Java 8 Neuerungen',
+          to: 'Max Kohl | [example.com] <kohl@example.com>',
+          cc: 'Ingo Best <iw@example.com>',
+          body: "Tag Max / Ingo!\n",
+        },
+      },
     ]
 
     count = 0

test/unit/email_process_test.rb

@@ -1985,6 +1985,42 @@ Some Text',
           ],
         }
       },
+      {
+        data: IO.binread('test/fixtures/mail37.box'),
+        success: true,
+        result: {
+          0 => {
+            priority: '2 normal',
+            title: 'Example: Java 8 Neuerungen',
+          },
+          1 => {
+            sender: 'Customer',
+            type: 'email',
+          },
+        },
+        verify: {
+          users: [
+            {
+              firstname: 'Example',
+              lastname: '',
+              fullname: 'Example',
+              email: 'info@example.com',
+            },
+            {
+              firstname: 'Ingo',
+              lastname: 'Best',
+              fullname: 'Ingo Best',
+              email: 'iw@example.com',
+            },
+            {
+              firstname: 'Max',
+              lastname: 'Kohl | [example.com]',
+              fullname: 'Max Kohl | [example.com]',
+              email: 'kohl@example.com',
+            },
+          ],
+        }
+      },
     ]
     process(files)
   end