Pylons/pyramid_mailer — pull request #49 by moriyoshi (2013-08-19 14:29:14+00:00)
Title: Support `7bit' and `8bit' transfer-encoding, in order to expand encoded characters verbatim into the payload.

It sometimes is necessary to pass an already composed Attachment object to pyramid_mailer in order to gain more control over the whole message being delivered. In such a case, it would be handier if 7bit or 8bit encoding can be specified as transfer_encoding.