Check this article.
https://www.spikenow.com/help/account-management/#Change-the-organization-of-conversations
You can setup a separate Sent items folder or include the send items within your conversations
https://www.spikenow.com/privacy-policy/
Note: I don't work for Spike, nor am I associated with them. I am just a user who didn't find a community of Spike users and decided to create my own.