Steps to reproduce:
1. Configure JETI to send emails in HTML format
2. Click on the manual email button
3. Enter your message in the JETI Rich text editor
4. Click send
Sent message is added to the issue as a comment.
Sent message is added to the issue as a comment with all HTML tags visible
This behaviour is also valid if you paste HTML text from clipboard directly into JETI Rich text editor or Tools > Sourcecode window