Thanks John for the get_body() function, here is my first commit.
This leads to 119 failures, but I believe this is the right next
step as the test itself was to lax, missing problems which the test
authors probably did not understand.

changeset:   4965:a850f8bae536
tag:         tip
user:        Bernhard Reiter <bernhard@intevation.de>
date:        Mon Mar 02 17:08:40 2015 +0100
files:       test/test_mailgw.py
description:
Moved test_mailgw to email module and make message comparison sharper to
flag differences in headers with the same name.