I am having some problems with the Subscribe2 plugin. When I go to send an email and I click 'Preview' or 'Send' I get an error message: Message failed! Check your settings and check with your hosting provider
Does anyone know what could be causing this. It's very strange because when I use the form on my site to register a new user, the new user receives the email that asks them to complete and confirm the subscription. Once they have confirmed and completed the subscription, I then receive the email telling me that I have a new subscriber. Also, when I go into the settings and click 'Send Email Preview' it works and I receive the email preview.
Has anyone experienced this issue before? Any help or advice would be greatly appreciated.