Excellent Plugin and Support too.

This plugin is excellent. It has a fun drag and drop formatter on the backend.
It could be smoother in a few organization details, but it works great.
Support has answered my questions through the WordPress Plugin Support forum (this forum) overnight.
CSS files are editable. He has created themes so I have great places to start.
I recommend this plugin. There is a paid upgrade, but I haven’t needed to buy it.
Each form can have it’s own auto reply emails sent to admin (or other) and sent to the new registrant in HTML or text.
I worked through a lot of contact forms and newsletter plugins before I settled on this one.

When I ask support a question he actually tells me the answer in his reply right there, instead of taking the lazy way out like some developers do and saying: “previously answered. click here.”

Highly recommended.