For delaying email delivery from your server, it largely depends on what email system you're using. If it's something like Postfix, you can tweak settings to delay outgoing messages. Some folks use a script to hold emails for a bit before letting them go. Alternatively, if you're not into diving...
Since in-place upgrades for Plesk on CloudLinux 7 to 8 aren't supported, consider setting up a new server with AlmaLinux 8, then use Plesk's Migrator Tool to transfer your data and configurations. Ensure thorough backups before starting and test the migration in a non-production environment...
Love the new feature, but I've got a quick question. A few weeks back, I manually updated to version 10.11.6, which is the most recent one supported by Plesk, isn't it? On the Tools & Settings page, there's a message saying, "You are already on the LTS version. Plesk will automatically update to...