I've always stressed the importance of a home grown list, done with care and tenacity.

The growing of this kind of list, as harder as it can get, must be done in the right way: one that complies with Law and that make our would-be subscribers confident about us and our brand.

One simple way used by many marketers for quickly growing a list is what is called opt-out subscription. With this method they simply gather e-mail addresses from anywhere (commercial trade shows, the Internet, every kind of contact they make...) and add them to their list. If the recipient it's not willing to receive more e-mail from you they have the option to unsubscribe anytime. Although this is a method accepted by many companies, it's not very advisable. Many people, angry or simply not recognizing your brand, will mark the e-mail as spam causing harm to your brand (and your send reputation). In fact this is a kind of unsolicited e-mail and you could be fairly considered a spammer, and in some countries (in Spain, for example) if you send more than three e-mails in one year to a recipient without consented permission you could face important fines. 

Another way to get someone subscribed to your list is single opt-in subscription. In this case the recipients go to your webpage and use a sing-up form to enter their e-mail address. Automatically they're added to your list and start sending your messages. This is a better approach but has a lot of potential problems:

· You're not ensuring that the e-mail address entered is correct. One single character mistyping is enough.

· You have no way to check that the person who is subscribing is the owner of the address. This can lead to very bad situations such as you contributing to "mail bombing" operations (someone get subscribed to many e-mail lists by other person).

· Your list can be poisoned by malicious competency or by a cracker just for fun. This consists on adding to your list several spam-trap e-mail addresses. When you send e-mail to them you could end up in several black-lists without even noticing. Very bad situation :-(
· False subscriptions of people who only want to get to your content but are not willing to give you a real address in exchange.

A variant of this method is called notified single opt-in. This is simply the same as the previous case but sending a notification e-mail to the new subscriber. If she doesn't want to receive your e-mail she can automatically unsubscribe by clicking on a link. This don't avoid many of the problems I've just spotted, so I don't recommend it either.

The best way to grow your list is by using double opt-in or confirmed opt-in. With this method your new subscribers don't get added to the list until they confirm their subscription clicking in a link in an immediate e-mail they receive. In this way you are sure that the address is correct and that the new subscriber is willing to receive your e-mails. This is the best way to go, although it is not without problems if you don't have the right tool to automate the process.

Fortunately MAILCast has built in capacities in order to customize your subscription process, letting you chose the exact way you want to go.

In a future post I'll show you how to automatically handle and customize the subscription and un-subscription process with MAILCast.