Even if it does write to a database, assuming that you can programmatically access it, you could build something that works with apache (or runs its own webserv

Even if it does write to a database, assuming that you can programmatically access it, you could build something that works with apache (or runs its own webserver) to translate URLs into doing database lookups. If you were to actually go about doing this (regardless of whether it is text files or a database), you'd also want to automatically include the URLs within the emails themselves, which I would think many mail servers would let you do.