I fixed by installing sendmail (needed by Elementor contact form) following this guide: https://www.digitalocean.com/community/questions/php-mail-function-enable
No, I talk about this: https://it.wordpress.org/plugins/elementor/
It is a web page builder, and it has a contact form widget.
If I try to send the form, it says: “Oops! I cannot send this email!”
