class Mail::Encodings::QuotedPrintable

that were incorrectly encoded as hex instead of literal CRLF.
Decode the string from Quoted-Printable. Cope with hard line breaks

def self.decode(str)
  ::Mail::Utilities.to_lf ::Mail::Utilities.to_crlf(str).gsub(/(?:=0D=0A|=0D|=0A)\r\n/, "\r\n").unpack("M*").first
end