Issue
When an email is sent to end user HTM tags are included in body of the email which will be something looks like below
Release
All
Cause
Most likely, they pasted HTML in to the TINYMCE editor, which was then encoded as wrong formate in HTML source code ("<b>Article:</b>")
Resolution
1) Go to notification and check for what it will contain Tab.
2) In what it will contain go to Message HTML and click on source code icon (<>) which will be in Message HTML editor.
3) Then paste the below source code in HTML Viewer which should look like ( This is sample source code, you can edit as per your requirement)
<p>Incident ${number} has been opened on your behalf</p>
<p><strong>Inciednt:</strong> ${URI_REF}</p>
<p><strong>Short description:</strong> ${short_description}</p>
4) After adding this formate in HTML source code message body looks like below
