server {
    listen 80;
    listen [::]:80;
    server_name example.com www.example.com mail.example.com autodiscover.* autoconfig.*;
    
    if ($host = autoconfig.example.com) {
        return 301 https://$host$request_uri;
    }

    if ($host = autodiscover.example.com) {
        return 301 https://$host$request_uri;
    }

    if ($host = mail.example.com) {
        return 301 https://$host$request_uri;
    } 

    if ($host = www.example.com) {
        return 301 https://$host$request_uri;
    }

    if ($host = example.com) {
        return 301 https://$host$request_uri;
    } # managed by Certbot

    return 404; 
}

server {
    listen 443 ssl;
    listen [::]:443 ssl ipv6only=on;
    server_name example.com www.example.com mail.example.com autodiscover.example.com autoconfig.example.com;
    
    ssl_certificate /etc/letsencrypt/live/example.com/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/example.com/privkey.pem;
    
    include /etc/nginx/snippets/ssl.conf;
    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem;

    ssl_trusted_certificate /etc/letsencrypt/live/example.com/chain.pem
    ssl_stapling on;
    ssl_stapling_verify on;
    
    return 301 https://$host$request_uri;
}