Message Boards does not process incoming email responses with additional recipient

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.2.X, Master
• Fix Version/s: 7.2.10 DXP FP6, 7.2.X, 7.3.4 CE GA5, 7.3.10 DXP GA1, Master
• Component/s: Message Boards
• Labels:
  • ee-ts
  • liferay-fixpack-dxp-6-7210
• Branch Version/s:
  7.2.x
• Backported to Branch:
  Committed
• Fix Priority: 3
• Git Pull Request: https://github.com/liferay-lima/liferay-portal/pull/38

Steps to Reproduce

1. Download GreenMail Standalone .jar here: https://repo1.maven.org/maven2/com/icegreen/greenmail-standalone/1.5.13/greenmail-standalone-1.5.13.jar
2. Start up GreenMail with the following command

java -Dgreenmail.smtp.port=12345 -Dgreenmail.pop3.port=54321 -Dgreenmail.users=test:[e-mail],events:[e-mail] -Dgreenmail.auth.disabled -jar greenmail-standalone-1.5.13.jar

3. Connect Thunderbird (or another email client) to GreenMail (https://webelement.click/en/greenmail_setup_mock_to_test_emailing_with_greenmail, starting from 'Connect to GreenMail with mail client')
4. Set the following in portal-ext.properties:

pop.server.notifications.enabled=true
company.security.strangers.verify=false

5. Go to Control Panel - Configuration - Server Administration - Mail and configure the following:

Incoming POP Server - localhost
Incoming Port - 54321
Use a Secure Network Connection - Unchecked
User Name - [e-mail]
Password - test
Outgoing SMTP Server - localhost
Outgoing Port - 12345
Use a Secure Network Connection - Unchecked
Enable StartTLS - Checked
User Name - [e-mail]
Password - test

6. Update default admin user's email address to [e-mail]
7. Go to Site Administration - Content & Data - Message Board - Configuration - Email From tab, and change the address to [e-mail]
8. Add a Message Boards widget
9. Create a new Category and subscribe to it
10. Add a new Thread to the category
11. Reply to the email notification using the sender (ex [e-mail]) as the first to address and [e-mail] as the second to address
12. Wait a minute and confirm the reply appears in the Message Boards thread
13. Reply to the email again but this time use [e-mail] as the first to address and the sender (ex [e-mail]) as the second to address

Expected Results
The reply is posted to the Message Boards thread

Actual Results
The reply is not posted to the Message Boards thread