Litespeed has developed their own caching plugin, which we highly recommend you use. We have found stability issues with other popular wordpress plugins.
The Litespeed plugin has full support for adding a Redis cache.
By default, none of our images include any kind of MTA. Additionally, some of our providers explicitly block port
25 on their container nodes.
Our default wordpress image includes an smtp plugin that you may activate and use.
Please see our guide to sending mail.