Email notification of Web Content in workflow having property "To" empty.

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: Master
• Fix Version/s: 7.1.10 DXP FP26, 7.1.10.7 SP7, 7.1.X, 7.2.10 DXP FP15, 7.2.X, 7.3.10.3 DXP SP3, 7.3.X, 7.4.2 CE GA3, 7.4.13 DXP GA1, 7.4.3.4 CE GA4, Master
• Component/s: Mail
• Labels:
  • ee-ts
  • liferay-dxp-71-sp7
  • liferay-dxp-73-sp3
  • liferay-fix-pack-dxp-3-7310
  • liferay-fixpack-dxp-15-7210
  • liferay-fixpack-dxp-26-7110
  • liferay-fixpack-dxp-3-7310
• Branch Version/s:
  7.3.x, 7.2.x, 7.1.x
• Backported to Branch:
  Committed
• Git Pull Request: https://github.com/liferay-workflow/liferay-portal/pull/423

Description
Email notification of Web Content in workflow having property "To" empty.

Steps to reproduce

1. Add the following properties to portal-ext.properties

   [email protected]
   
   mail.send.blacklist=\
           [email protected],\
           [email protected],\
           [email protected]

1. Start Liferay
2. Navigate to Control Panel > Configuration > Server Administration > Mail
3. Setup mail SMTP settings
4. Navigate to Control Panel > Configuration > Server Administration > Log Levels
5. "com.liferay.petra.mail" set to DEBUG
6. Navigate to default site > Content > Web Content
7. Click info button > tri dot button > Edit
8. Select "Single Approver" and save
9. Add a Web Content and click "Submit for Publication"
10. Check debug logs

Actual result
Property "To" is empty and mail application does not show any recipient.

2021-05-14 01:56:25.436 DEBUG [liferay/mail-1][MailEngine:208] To: []

Date: Fri, 14 May 2021 01:56:25 +0000 (GMT)
From: Test Test <[email protected]>
Message-ID: <[email protected]>
Subject:
MIME-Version: 1.0
Content-Type: text/html;charset="UTF-8"
Content-Transfer-Encoding: 7bit
X-Auto-Response-Suppress: AutoReply, DR, NDR, NRN, OOF, RN

Expected result
Property "To" contains the recipient's email address.

Reprodued in
DXP-22
7.1.x commit (dc9427cf51b7d3a728848498242261767fe6d09a)
Master commit (5e223c8b9f0215cb982ccf36e1fcf32db9ad262a)

Note
In the notification email when creating a user, the recipient is set to "To".
Please refer attached "DEBUG_create user.log".

2021-05-14 02:03:26.958 DEBUG [liferay/mail-1][MailEngine:208] To: [1 user <[email protected]>]

Date: Fri, 14 May 2021 02:03:26 +0000 (GMT)
From: Test Test <[email protected]>
To: 1 user <[email protected]>
Message-ID: <[email protected]>
Subject: http://localhost:8080: Your New Account
MIME-Version: 1.0
Content-Type: text/html;charset="UTF-8"
Content-Transfer-Encoding: 7bit
X-Auto-Response-Suppress: AutoReply, DR, NDR, NRN, OOF, RN