www-validator@w3.org from January 2019 by subject

bad gateway response

Could be helpful

False warning in HTML5 verifier

Miss Lang https://www.fikriwildannugraha.com/

Modern button for good result of validation HTML5

Nu Html Checker

Nu Html Checker has problems with password protected HTML 5 webpage

Regarding bad gateway response for website validate

Request for explanation: "the main element must not appear as a descendant of the td element" error message.

Scammers using the W3C validator

x-dns-prefetch-control

Last message date: Thursday, 31 January 2019 14:20:45 UTC