INCOMPLETE(!) Attempt to replace the rfc822 module with the email module.
diff -r 2c3cc4ccd024 test/test_mailgw.py
--- a/test/test_mailgw.py	Mon Feb 16 17:43:58 2015 +0100
+++ b/test/test_mailgw.py	Wed Feb 25 23:50:13 2015 +0100
@@ -11,9 +11,9 @@
 
 # TODO: test bcc
 
-import unittest, tempfile, os, shutil, errno, imp, sys, difflib, rfc822, time
+import email.parser
+import unittest, tempfile, os, shutil, errno, imp, sys, difflib, time
 import gpgmelib
-from email.parser import FeedParser
 
 
 try:
@@ -43,15 +43,6 @@
     """
     return lambda x: 0
 
-class Message(rfc822.Message):
-    """String-based Message class with equivalence test."""
-    def __init__(self, s):
-        rfc822.Message.__init__(self, StringIO(s.strip()))
-
-    def __eq__(self, other):
-        return (self.dict == other.dict and
-                self.fp.read() == other.fp.read())
-
 class Tracker(object):
     def open(self, journaltag):
         return self.db
@@ -59,7 +50,8 @@
 class DiffHelper:
     def compareMessages(self, new, old):
         """Compare messages for semantic equivalence."""
-        new, old = Message(new), Message(old)
+        new = email.parser.Parser().parsestr(new.strip())
+        old = email.parser.Parser().parsestr(old.strip())
 
         # all Roundup-generated messages have "Precedence: bulk"
         old['Precedence'] = 'bulk'
@@ -3504,7 +3496,7 @@
         # trap_exc=1: we want a bounce message:
         self._handle_mail(self.encrypted_msg, trap_exc=1)
         m = self._get_mail()
-        fp = FeedParser()
+        fp = email.parser.FeedParser()
         fp.feed(m)
         parts = fp.close().get_payload()
         self.assertEqual(len(parts),2)
@@ -3515,7 +3507,7 @@
         res = ctx.op_decrypt(crypt, plain)
         self.assertEqual(res, None)
         plain.seek(0,0)
-        fp = FeedParser()
+        fp = email.parser.FeedParser()
         fp.feed(plain.read())
         parts = fp.close().get_payload()
         self.assertEqual(len(parts),2)