Failed parse of received header containing <multiple recipients>

we are running mail from the 2-5-stable branch

seeing this. Is there any more info I can provide?

``` ruby
self.raw_message.received.errors
[[#, #, # (version=TLSv1 cipher=RC4-SHA bits=128/128); Tue, 06 Aug 2013 07:40:18 -0700 (PDT)|
Reason was: Expected one of
, (, @, > at line 1, column 127 (byte 127) after from [192.168.1.186] ([206.248.139.39]) by mx.google.com with ESMTPSA id m10sm4741360qae.12.2013.08.06.07.40.15 for ]]
```

Reproduce the failure using the Received header shown in the issue and inspect Mail::ReceivedElement through self.raw_message.received.errors. Determine why the address containing is rejected, then verify that this header parses without a Mail::Field::ParseError and that existing parsing behavior remains intact.

Written by the indexing model from the issue text.