With the WordPress 5.5 release, you may have experienced new random daily emails you may have received for every WordPress self-hosted theme and plugin update.
Here is how to stop email notifications for theme and plugin updates:
Copy the code below in your domain theme’s functions.php file… It will look something like this…
// Disable auto-update email notifications for plugins.
add_filter( 'auto_plugin_update_send_email', '__return_false' );
// Disable auto-update email notifications for themes.
add_filter( 'auto_theme_update_send_email', '__return_false' );
I hope this helps,
Thanks & Regards
Mandar Apte