Check your Sender Policy Framework (SPF) • 31 Jul 2020
I have created an easy tool to check your email SPF configuration
(what is specified in your DNS config about what servers can send email for your @domain email addresses).
Create a Content-Security Policy • 01 Jun 2020
A CSP or Content-Security-Policy is a definition of what kind of external or internal content is allowed in your website. It is given as a long string in a HTTP header.