This series of posts are iterative, layering in functionality piece by piece so you can fully understand (and enhance as required) the complete solution. If you not interested in build the Email-to-Lead piece by piece, no problem. The completed Email-to-Lead template is included in the package.
In this example, we are linking email attachments to the email message record. Similar to our Email-to-Case flow, you have the ability to override this decision at any point. For example, maybe you want to store email attachments at the lead level.
Update the Flow
Open you flow and simply reconnect the If Content Versions Populated, Create Content Versions, and Create ContentDocument process steps you originally copied from the Email-to-Case template.
Your flow should look a little something like the following.