Fabian Tan

If you have signed up for an autoresponder service such as Aweber or Get Response, you might be given a choice between using the double opt-in format or the single opt-in format.

Single opt-in format means your subscriber doesn't have to confirm his subscription by clicking a link in your email, but double opt-in means he must confirm his subscription before he is opted in to your list.

Personally I always use double opt-in (and Aweber always recommends using double opt-in). Single opt-in may be outlawed one day and you'll lose the majority of the list that you have built from scratch.

Yes, you might be leaving a little money on the table right now, but it'll come back to bite you in the end. You'll have way lots more spam complaints from using single opt-in because some of the emails will be fake, and you might receive more emails from angry people who didn't really opt-in to your list but had other people enter their email in for them.

Some of the gurus use single opt-in, that's because they can 'afford' it. If they lose the list, their traffic generation sources will easily churn out a massive new one really quickly. Unless you have that capability, then double opt-in is the way to go.

You won't have people entering fake emails or your competitor's emails to get you in trouble.

My suggestion is this: use single opt-in for coregistration leads (using a separate autoresponder, preferably a hosted one on a separate server from the one your main website your uses), but double opt-in for your main list.

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