How I Saved $10,000 with a Mailing List

No, it's not an article about spamming people to make money. Rather, I wrote this piece at O'Reilly Networks to discuss how I built my own mailing list software that's incredibly reliable and robust with a few hours of programming using Apache, sendmail, perl, and MySQL. If you're running Movable Type, you can use my scripts to create a mailing list with double opt-in confirmation, Web-based and email-based subscribe/unsubscribe, and a few other features for free.