Lightmeter is your go-to solution for hassle-free email deliverability management. This nifty open-source tool works right on your server, keeping a watchful eye on your mail logs and dishing out real-time insights to keep your email game strong.What's in the box? Lightmeter comes packed with mail server monitoring, incident alerts, inbox integration, and message tracing. It even keeps tabs on those pesky Real-time Block Lists to keep your sender rep squeaky clean.Here's the kicker - it's absolutely free! That's right, this open-source gem won't cost you a dime.On the plus side, Lightmeter is a budget-friendly option that's easy to use and offers comprehensive monitoring. However, it's worth noting that it currently only plays nice with Postfix SMTP servers and is still in its early stages, so it might not have all the bells and whistles of more established tools.Ready to take control of your email deliverability? Watch this tutorial to get started with Lightmeter.