<https://protonmail.com/support/knowledge-base/third-party-email-client-integration-outlook-thunderbird-apple-mail-ect/#webpage>
<http://schema.org/datePublished>
"2015-01-10T22:35:45+00:00"^^<http://schema.org/Date>
<https://protonmail.com/support/knowledge-base/third-party-email-client-integration-outlook-thunderbird-apple-mail-ect/?replytocom=1746>