
I’ve noticed a trend lately: a lot of sign-ups to my mailing list from the same IP address. So I did a little research and lo-and-behold, it’s a “zombie” computer automatically signing up for ezines in order to steal the return address when you send the “thanks for signing up” autoresponder. (Those little stinkers!)
So, what do you do?
- First, check to see if your ezine software captures the IP (internet protocol) address of people when they sign up. I use Professional Cart Solutions (a variant of 1shoppingcart.com), and they DO capture IP addresses of each person who signs up.
- Next, check for repeat IP addresses. I notice that these sign-ups are always in the “waiting for optin” list under the Manage Clients tab, because they have no intention of opting-in. It’s easy to find them: look for email addresses that don’t match the name they signed up under. For instance, the name is “Mary Jones” but the email address says georgesmith@xxxxxx.com. The email addresses are almost always from hotmail.com, gmail.com, mail.com, or yahoo.com because these are free email services.
- When you find repeat IP addresses, type the IP address into Google and do some research. For example, this IP address comes up a lot on my wait-list: 203.113.13.3. When I type it into Google, I find that it’s a zombie computer and Wikipedia has blocked it
- Finally, I go back to my mailing system, and look for the place where I can block specific IP addresses from either ordering from me or from signing up for my mailing lists. In the case of Professional Cart Solutions/1shoppingcart, it’s under the Orders tab.
Voila! Now that zombie can’t sign up for my mailing list anymore!
It takes a little due diligence to keep your list clean, but it’s well worth it. And if your mailing list system won’t let you ban IP addresses, consider switching to a new one.