Craigslist – How a Seller Knew My Name Using Anonymous Email

If you're only looking to keep an electronic record of when you submitted a form, you can do something like this:

• Get a piece of software that lets you print to PDF. Basically, this is just a print driver that you "print" to as if it were a printer, but the output is a PDF file to your hard drive. There are quite a few of these; PDFCreator is onesuch, but if you look around a bit you should be able to find one you like.
• When you submit a form, you should get a confirmation page. Use the print function of your browser to print to PDF. The headers and footers of the printout should contain the URL as well as the time and date.

Not all confirmation pages echo back the information you submitted (for security reasons) so you might also want to print the form prior to submitting it.

I did an exact-phrase search through the Craigslist help desk forum archives for the query [ "after 6 months" ].

I found that an anonymous forum poster reports:

Emails just vanished after 6 months, according to my correspondent (we had already exchanged alternate addresses). No bounce.

My own experimentation with replying to very old threads indicates that the anonymous poster is probably correct. Indeed, your new email will never be delivered. Instead, it will be silently discarded. And, indeed, you will not get any notification that the email was discarded.