EmailSpec with Cucumber is a great combo. How else could you get such nice BDD syntax such as;

And if you happen to be using EmailSpec 0.3.5 and you're getting an error like this, I may have a solution for you;

I fixed the offending bug - grab the code either at Gemcutter

or via GitHub

http://github.com/glennr/email-spec

If you're reading this Mr Mabey, please include in the next email-spec patch :-)