UniversalMailer/UniversalMailer — pull request #16 by lukele (2013-07-06 16:20:49+00:00)
Title: Don't touch GPG or S/MIME signed messages.

If UniversalMailer recognizes that a message is signed, by querying the MessageWriter's
signsOutput property, the original method is invoked and no further modifications of the
message are performed.