How to filter (spam) emails with the roundcube and cwp
https://www.youtube.com/watch?v=7-K8SLxHeB0
User Domains/SubDomains tutorial
https://www.youtube.com/watch?v=yBLzmbX2EdE
Crear cuenta de correo en panel
https://www.youtube.com/watch?v=gdI-KmXLi_Q
PHP Selector tutorial
https://www.youtube.com/watch?v=XMDYX0hHV_o&t=54s
DNS records tutorial
https://www.youtube.com/watch?v=AOzpA6834no&t=28s