I've just installed LinkChecker [1]on the Jenkins server. It's currently running once an hour against http://www.cyrusimap.org/ and will report any broken links to https://ci.cyrus.foundation/job/LinkChecker%20-%20CyrusImap.org/
If you click the most recent job (under build history), then click 'Console Output' you can see the most recent report. Over time it would be good if we could fix the broken links or I can add ignore rules for anything we don't plan on fixing. Cheers, Chris Links: 1. http://wummel.github.io/linkchecker/