Configure a Linux server with plesk for mutual authentification
Budget: $30 – $250 USD
The work is simple. You need to configure Postfix to accept mutual authentication.
So when we send a message via postfix via SMTP, the receiving server to which we send the mail can validate that we are using the right server via the let's encrypt certificate.
There are articles on this but it needs to be made compatible with Plesk:
https://blog.mortis.eu/blog/2017/06/dovecot-and-postfix-with-client-cert-auth.html
https://www.vanimpe.eu/2021/05/11/postfix-with-client-authentication/
So when we send a message via postfix via SMTP, the receiving server to which we send the mail can validate that we are using the right server via the let's encrypt certificate.
There are articles on this but it needs to be made compatible with Plesk:
https://blog.mortis.eu/blog/2017/06/dovecot-and-postfix-with-client-cert-auth.html
https://www.vanimpe.eu/2021/05/11/postfix-with-client-authentication/