Recently many of our customers had asked us how they can disable AutoSSL notifications to the end user cpanel account emails. So we guys made a reasearch on this and got the cpanel forum link which this discussion was already going on and saw a script.

Save the below to /root/autossldisable.sh, chmod 755 autossldisable.sh and then run it with ./autossldisable.sh

#!/bin/bash
cd /var/cpanel/users
for user in *
do
    cpapi2 --user=$user CustInfo savecontactinfo notify_autossl_renewal=0 notify_autossl_renewal_coverage=0 notify_autossl_expiry_coverage=0 notify_autossl_expiry=0 notify_ssl_expiry=0
done

This will disable  5 AutoSSL notices off for every user on the server.

Hope this helps

Update : Good news is that by Cpanel 70 version, you will have these options available at Manage Autossl section in the WHM

Reference and Courtsey for the above script : forum.cpanel.net

Reference Link for full discussion : https://forums.cpanel.net/threads/ssl-notifications-in-cpanel-68.614395/