Updated to build 3.12.11-0ubuntu1.15.04.1 and successfully sent an email with 0.5MB attachment, which would have failed with the unpatched version before. So from my point of view the fix works as expected.
Updated to build 3.12.11- 0ubuntu1. 15.04.1 and successfully sent an email with 0.5MB attachment, which would have failed with the unpatched version before. So from my point of view the fix works as expected.