Latest commit 21222e1 May 22, 2017 @jeremy jeremy Eliminate attachment corruption caused by line ending conversions
* Omit initial CRLF linefeed conversion since CRLF are required newline
  separators. We shouldn't need to convert bare CR or LF. Update our
  fixture emails to use CRLF throughout. Closes #609. Fixes #408.

* Drop quoted-printable CRLF conversion. This was introduced to
  harmonize with Ruby's \n-based line endings. But this breaks Q-P
  encoding with binary data. It's not *meant* for binary data, but we
  don't yet take adequate measures to use base64 for these cases.
  Reverts #496. Fixes #1010.

Closes #1113