Rocket Validator automatically scans your sites for accessibility issues using the W3C Validator,
hosted on our own servers and integrated into our web crawler.
HTML issues tagged as bad value.
<a> tags can be used to link to an email address using the mailto protocol in the href attribute. Ensure that there is no space in the email address.
<a href="mailto: email@example.com">This is wrong as it contains an space</a>
<a href="mailto:firstname.lastname@example.org">This is OK</a>