Why is it important to clean your subscribers base
Large list of email addresses doesn’t mean efficient email marketing building. You can send newsletters to thousands of your subscribers but only a few open them.
We use Advanced Newsletter + MailChimp for our email marketing purposes. The Advanced Newsletter extension allows us to segment our subscribers and send them the information they are interested in only. MailChimp is very cool and useful email marketing service which lets us to successfully send our campaigns as well as thoroughly analyze them afterwards.