Rocket Validator integrates the W3C Validator HTML checker into an automated web crawler.
HTML issues tagged as microsoft.
An invalid CSS property is being used. Properties starting with
mso- are commonly defined by Microsoft products like Office and Outlook.
These properties, like
mso-margin-top-alt and others starting with
mso- are not standard CSS properties.
25,000 HTML checks per month. Fully automated.
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