I had a quick Twitter exchange with the author of NodemailerApp yesterday and started looking into it. Very interesting free tool with built-in SMTP and POP servers, IMAP upload capability, and a functional email viewer.
Something that caught my attention right away is that it can ingest a folder of EMLs or an mbox file (e.g., Takeout), lets you review the emails, filter them by date ranges or other criteria, export them to PDF individually, or export search results to mbox!
While not a replacement for a forensic investigation tool, this could come in handy to take a quick look at an email collection or to narrow it down post-acquisition in a pinch.
Any users of it in our community?