How to remove the email signatures from Emailed request type form?

[Risikanta Pradhan]

When users submit a ticket by emailing the Helpdesk, the email often includes HTML signature elements such as text and images, making the ticket hard to read. We have tried following the guidelines from the official document (link -https://support.atlassian.com/jira-service-management-cloud/docs/hide-email-signatures-in-the-issue-view-and-portals/) to remove the signature from the emailed requests, but it hasn't been successful, and the signature still appears in the description.

I have attached a screenshot below showing that we have used custom text to detect and hide signatures.

 

Please let us know what we might be doing wrong or if you have any other way to remove the email signature from the issue.