Email validation failed: Email body comprised of invalid HTMLSummaryServiceNow workflow designers can potentially face Email validation failed exception with the exception message being "Email body comprised of invalid HTML" during the "send email" action. The proper fix is to inspect the generated email content and see why it is deemed as an invalid HTML by the system parser. You can use a tool like the W3C validator tool. There is a system property, glide.email.body_html_validation_rule, and is usually set to the value basic. It accepts xhtml or none as a value. You may try setting it to xhtml or none and see the impact it subsequently has on "send email" action in the workflow. The system property governs how the email content should be validated. Also, as a word of caution, run this change by your security team and obtain their approval.Related Linkshttps://www.servicenow.com/docs/bundle/yokohama-build-workflows/page/administer/flow-designer/reference/send-email-flow-designer.html An alternative approach suggested by a ServiceNow Community contributor