In the latest version (21.7.48) I’m abandoing Emails tab and merging it with History.
If you go to History, your Create, Update, Delete and Email actions will be shown on the same screen but you can filter by action. For example, you can select Email action in top-right corner which will give you email log only just like Emails tab.
The advantage of this approach is that when you view history for a transaction (e.g. invoice), you will see when the email has been created, updated, emailed etc. on the same screen. It just makes sense for Email to be part of history.
As for deleting individual emails, I’m not planning to support this just like no support for deleting individual history entries. However, I could implement some kind of Purge mechanism. E.g. purge all history older than 1 year (or whatever age you specify).
Currently the only way to purge history is to create a backup without history.