Email is still the most widely used tool for communicating with people but it’s a tool to use cautiously. If you become known as a spammer, your email address will get black-listed so non of your emails reach their recipients.
That doesn’t mean you should stop emailing people, just make sure you’re offering something of value that they actually want. A much safer way to go is through email subscriptions to your website where visitors sign up to receive updates. It’s not the “if you build it they will come” type of resource, but if you provide enough useful information on a regular basis, you’ll get subscribers. More importantly though, they’re the right subscribers and they want to hear from you.
Websites from my-real-estate-website.com have built in email subscription functionality using a service called Feedburner from Google that uses RSS technology to deliver your content right to subscribers Inbox. It’s a great service and it’s free. A couple of advantages to using feedburner: