Decode RFC2047 encoded Subject when accessing held messages
Fixes #219 (closed)
Fixes postorius#143 (closed)
I'm unsure about all the errors I'm supposed to catch.
The base error class for all errors in the email module is supposed to be MessageError.
If I supply bogus encodings, I get a LookupError so I added both to the except clause.
I just found out that you wrote the email module @warsaw :-)