Growing your mailing list is always a top priority.
However, harassing visitors with annoying popups (asking for their email) a few seconds after they landed on a page will only increase your Bounce Rate and kill your Conversion Rate. Not worth it.

We all would like to get the email of every single visitors to our website, but displaying an aggressive form that pops up immediately as a new user lands on our pages is not going to work. We need to let the visitor familiarize with our website and only then, we might ask for his email. We need to make the popup easy to close, the form as short as possible. Even better would be to offer something in exchange for the visitors email: a coupon, a free ebook, a ticket for a ruffle, or some additional information hiden to anonymous visitors.

Franco Folini lives and works in the eCommerce territory, a wild area between the Kingdom of Technology and the Kingdom of Marketing. He speaks fluently the language of both realms. For many years, Franco has been helping people bridge the divide and successfully collaborate.
If you want to find out more about Franco, visit his LinkedIn profile or send him an email folini[at]gmail.com