Why is this important? Have you ever called someone only to discover they had a new area code? Now you have to go and chance down the new area code and update your database, then dial again. ContactZone can clean that up before you dial the first digit.

It's even more important if you're going to mail something using the post office. For those of you who haven't been out for a while, that's the place where they actually carry physical printouts of letters from one place to another so people can read it. Yes, it's so last-century, but we all still send regular mail as well as email. And regular mail is costly. If you send a letter to the wrong address, you don't just get a bounce in your email box, you're out real cash. Do that a bunch of times and it begins to add up.

Instead, you can use ContactZone and it'll take a stroll through your data, making sure all your addresses are deliverable. No wasted stamps! And, of course, no wasted cash.

The free version of ContactZone will process up to 250 addresses. If you want to process more, a reasonable $49 will get you a version that will process an unlimited number of addresses for a year. At $0.37 for a first class stamp, the unlimited version of ContactZone will pay for itself when it finds 135 incorrect addresses. Since we know that more than 10% of the population moves each year, if you're doing a mailing of 1,350 pieces or more, you can expect the full version of ContactZone to save you some real green.

Denise Amrich is co-founder of ZATZ. Her email address is denise@zatz.com.