class Mail::Part

def parse_message

A part may not have a header.... so, just init a body if no header

def parse_message
  header_part, body_part = raw_source.split(/#{Constants::LAX_CRLF}#{Constants::WSP}*#{Constants::LAX_CRLF}/m, 2)
  if header_part =~ Constants::HEADER_LINE
    self.header = header_part
    self.body   = body_part
  else
    self.header = "Content-Type: text/plain\r\n"
    self.body   = raw_source
  end
end

Instance Methods