Issue Summary

• Tickets are getting incorrect description/comment like "Color value is invalid" when the email to create the ticket contains embedded HTML that contains a CSS style sheet like "color: revert !important;"

• Customers usually face this issue when they have enabled Microsoft defender's "Anti-phishing" policy which prints a table in the new email from a new user stating that "You don't often get email from xxxx@mail.id. Learn why this is important" written in an HTML table containing a CSS style sheet. I am also attaching the HTML table content for this mail that contains the CSS style sheet which is causing the issue. 
• This can create a problem for a customer where the end-user user is trying to add HTML content with an affected CSS style sheet.

hello_world123.html

Steps to Reproduce

1. Please send a mail from Outlook mail server with "color: revert !important;" in the {} bracket and check what you see in the Jira ticket description.

Expected Results

The description contains the Table with CSS style sheet color in it.

Actual Results

Workaround

 I will suggest you to consider attempting to disable the HTML parsing within your Service Desk configuration:

• https://<BASE_URL>/secure/admin/SDMailInfo.jspa and select the option "No, remove the formatting by converting HTML messages to plain text".

Depending on the nature of the HTML received by Jira, this action could potentially reduce the amount of undesirable content added.

This workaround will not print HTML content in its desired form, but it is very rare that a user uses HTML in an email.

Versions Tested

Please confirm all versions that have been tested for this issue, and indicate whether the tested version is affected or not affected, below: