Flolagale/mailin — pull request #10 by inxilpro (2014-08-08 14:20:30+00:00)
Title: More robust tests of envelope

I updated the test such that it uses a different to/from address in the envelope than in the message headers, and then confirms that `to`/`from` and `envelopeTo`/`envelopeFrom` are in fact different.