As @Christian_Byron mentioned, this might be from difficult to impossible, without some server help.
But if you’re going to have server help, I would not choose email for this. Why not something like an online spreadsheet? Just add a row with date/time, url/pagename of tiddler, and whatever other metadata you have handy.
But there’s a wrinkle, and there will be with any such solutions. You would either need to (insecurely!) put some secret information into your wiki in order to use the API for these (or for email) or you would need the users to authenticate with some third-party service in order to use this tool. If you do the former, you’re ripping open a huge security hole in your app, and likely violating the terms of service of the API you use. If you do the latter, then how much do you gain for the hassle?
The final option I can think of is to reconsider this:
I am not using node.js.
It would presumably be easy to extend the Node implementation to add this tracking by email, local document or online document. You can securely store your credentials online. I have never tried this, but it does not sound too hard. However, single file to Node.js is a big leap for many.