Excellent tool and excellent support

This is a very powerful yet simple to use tool for sending newsletters. It is plug, add some settings, and play. We use it to send out daily newsletters to 4k subscribers.
Their support is great. In our new website on the testenvironment Wysija worked great, but not on the live site. We gave them a Admin-login and they found out which plugin caused a conflict. That plugin was Redirection, which also appeared to cause other problems, so they helped us to get rid of two headaches at once. I would have given them 5 stars, if they would have had a two-column newslettertemplate. Up till now they only have one-column templates, but they are working on a two-column-version as well.